Friday, 17 March 2017

SPEECH WRITING.

As part of your Ordinary Level English Examination you might be asked to write a speech. The question is as likely to ask you to write a speech as it would any of these guided essay formats and it is always best to be prepared to tackle any format instead of only focusing your exam preparation on only a select few formats-a practice some students call “spotting.”

Writing Speeches
When you are asked to write speeches you should bear the following things in mind:
Speeches differ slightly with the other guided essays that you will be asked to write. Speeches are made to inform, share, and support/persuade your audience on the topic set out in the examination question.
You should write in a conversational style i.e. you should write the same way you speak. Imagine yourself in front of the given audience. Usually the question itself sets out the audience you are supposed to be facing for example a graduation speech would have you facing your fellow graduating students in perhaps the school hall/during assembly imagine what you would say to them.
Start and end with opening quotes either double quotations ” or single ‘‘quotations can be used at the beginning and last paragraph of the speech. It is always good practice to use these alternatively if they are nested. For example let us say you chose the double quotes to open your speech and somewhere in the speech you decide to include a relevant quotation by some famous author, it is good practice to use the single quotes to set out the exact words of that author in the speech instead of using the double quotes again. The converse would be true if you had begun by using single quotes.
Start by greeting your audience. The degree of formality and tone of the speech depends on your relationship with the audience and the topic of the speech. For example you could either start by saying,” Good morning to you my fellow students…” or “Good morning ladies and gentlemen…”
Depending on the situation the greeting may be followed by a self-introduction even if you have already been introduced and the audience knows you. This may be in the form of an allusion to your standing on the matter at hand for example “As your head girl …”
You might want to remind your student of the occasion. This can be done subtly for example,” I cannot believe this is our graduation day, it only seems only like yesterday when we started out as little tiny form ones.”
You should always state the purpose of your speech. The intend clause should fall naturally into place of your speech. This can be done by making sure that it matches the style of your entire speech. The purpose of the speech is usually given out in the question itself and even when it is not given you can always surmise from the points given in the speech. You could say for example,” As we march out into the wide and cruel world, I stand here as your sage, to impart words of parting wisdom.”
Speeches are written in the way that they are spoken which means a lot of the verbs are in the “-ing” format for example ” speaking” instead of “spoke” which would be more likely in say a narrative compositions. Also sentences may not follow the traditional structure, see tips below for more on this.
In informal speeches you can also make use of speech fillers like “Err…” and “Ummm..” although this should be done very sparingly.
It is considered bad form however to make use of fillers like “you know”,”so” where so is supposed to be a superlative for example “He was so short.”
Good speeches make use of rhetorical questions.
Elaborate the points given in the essay question adding relevant material of your own based on your experience.
End your speech by thanking the audience for their patience and attentiveness.
Another popular way to end a speech is to use a quote or a call to action. For example you could say,” Julius Ceaser said,’ I came, I saw, I conquered.’ I hope you too came to this school, saw enlightenment and will now go into the world and conquer It.” or you could say “Go out into the world and prosper!”

More tips
You can (this is a polite way of saying you must) also use discourse markers. There are three types of discourse markers and all these are indispensable when writing your speech.
While it is not required the best speeches often make use of poetic devices in order to captivate the hearts of their audience and if you are up to it you would do well to use the following techniques:
-Mock heroic writing
-Make sure that each sentence has roughly the same amount of syllables in each sentence (line).
-Make use of rhyming words to create a “rhythmic feel” to your speech. Do not sacrifice meaning just so you can get the rhyme that you want, the examiners will not be impressed.
-Repeat ideas and thoughts for emphasis, for good example see Martin Luther King Junior’s I have a dream speech.
-You can also change the traditional sentence structure to suit your needs so long as you do not violate the rules of grammar. For example instead of the more traditional structure statement,” This man I am speaking of is a tall and handsome.” You can instead say,” Tall and handsome is the man I speak of.” Both statements contain the exact same number of words but the second line sounds more poetic.
-Think of the paragraphs as more of stanzas instead.
-Make use of rhetorical questions to force the audience to think more deeply on the subject at hand.

As with all English topics you will need to practice more extensively in order to become proficient.

ARTICLE WRITING.

An article is a piece of writing that deals with a particular subject that will be published on a newspaper or magazine. It is written almost like a composition, it has an introduction, body and a conclusion.
Articles are magazine and newspaper style essays. As part of your ZIMSEC English Language examination you can be asked to write an article on a chosen topic in Section B of Paper 1. The given topics normally require you to write an informative article for example you can be presented with a topic such as, “Write an article for your school magazine titled, ’Why my school is the best.'”
Whenever presented with such a topic you should take an approach that is not very different from the one you should employ when dealing with argumentative essays although the “correct viewpoint” is this instance is non-optional. For example you cannot choose to say write about why you think your school is not the best.
You have to write supporting the topic and providing probably fictional information to expand and develop the points given in the question for example if the question has points like: High Pass rate, Recent successes in sport etc. you might want to support the first point by saying you school has consistently achieved a 100 % pass rate for the past 5 years and some of your students have received national prizes due to their academic excellence. It does not have to be true, just reasonable, plausible and in support of the given topic.

Format of an article
Headline/Title: Put title of article here. You could use the question as a guide e.g. Why my school is the best.
By/Author: Your Name here. E.g. Given Moyo.
It is always a good thing to provide a summation of your whole approach to the topic. For example you could begin by saying: “Although generally ignored by most in the media probably due to it being located far away from the capital, Achievers Academic Institute is undoubtedly one of the most premier learning institution in this country. In my eyes it is the best school there is.”
Aim to start with a lively interesting first paragraph that will make readers want to continue reading. Your introduction should not exceed 35 words and it has to be a single sentence.
Use a variety of sentence lengths and structures.
It can be a reported speech but you can add or include a few quotations of direct speech.
When quoting, instead of using said you may use the following words, commented, argued, emphasized concluded. Other words you may use are promise, suggest, deduce, stress, remark and announce.
Expand on the given points and fabricate sensible evidence to support them. Take care to arrange them in logical or chronological order and paragraph them accordingly.
Give a sensible conclusion. A rephrase of the introduction will do in most instances. For example you could end by saying: “With all this evidence presented, it is hard to argue with the fact that Achievers Academic Institute is the country’s best learning institution.”
Conclude with a short but a thought provoking or amusing paragraph

Other tips and things to note.
It is always a good idea to write short paragraphs when writing an article. Your paragraphs should be about 4-6 lines in length.
·         No signature is required.
·         Avoid colloquialisms and cliches.
·         Always present your work in a logical manner.
·         Always provide plausible evidence and information when supporting and expanding the points given in the essay question.
·         Avoid giving contradictory evidence.
·         Paragraph your article accordingly, as the notes of this section.
·         Make use of additional discourse makers such as firstly, secondly, thirdly, the other point is, in addition, furthermore, moreover.
·         Make use of illustrations, idioms/ figurative speech and similes.


REPORT WRITING.

REPORT WRITING.

Perhaps the most important form of communication within businesses and at the workplace is the report. They are found everywhere no matter what profession you will choose be it in the Sciences, Arts or Commercials field you will most likely have to file some form of report or another. Even a humble security guard is required to write regular reports, so are the police, army personnel, the self-employed, scientists, judges, lawyers, politicians and everyone else including even Tobacco farmers.
To prepare you for this, the English Language syllabus requires you to learn the proper format of a report. In Section B of English Paper 1 you might be presented with a question that will test you on your understanding of the report format.
Format of a report
To: [The full name or professional title of the recipient] for example: To: The General Manager.
From: [Your full name or title] for example: From: The Finance Manager.
Date: [Date on which the report was written] for example: 18 April 2014
Title: [A brief and descriptive title for the report] for example: Quarterly Financial Report.

Introduction
In the first paragraph state the Who, what, where and when. For example, “As is required by company policy and as the finance manager I hereby present the quarterly financial report for the quarter ended on 31 March 2014.”

Body
In the other paragraphs use the points given in the question and expand them using your knowledge and diligently present them in chronological or some other logical order. The points might be in the form of a graph or chart. In such cases do not merely repeat the information shown on the graph for example we had a Sales figure of $38 000 over the course of the quarter. Be insightful and analytic for example: We had sales of $38 000 in the quarter which is a decrease from the previous sales of $45 000 in the same quarter last year. This might be a result of a fall in demand of pencil skirts which were most popular product last summer. We hope to find alternative fashionable items to fill the void in the coming quarter.
In the last paragraph give a general remark or make a recommendation based on the topic. For example:
Generally the quarter was not as bad as we had feared although there is definitely some room for improvement next time around.

Tips for writing a report
Always state the purpose of the report in the first paragraph and your authority for compiling such a report.
You might also want to provide the general aim of the report.
Pieces of information (as given in the question) must include/be followed by reasonable and plausible explanations, comments, suggestions, situations and conditions depending on the nature of the question.
References to related correspondence/previous reports where appropriate must be made. For example: Based on my visit to your farm I have compiled this report on what I observed and my suggestions on what you should do to solve the highlighted problems.
Sequential or additional discourse markers would be useful as they make it easier for you to state ideas and for those reading to follow the report. For example words like: Firstly, secondly and finally.

Whenever appropriate try to predict the future based on your understanding of current data. For example: We expect food production to continue to increase at Mpumelelo farm as demand is still healthy and the macroeconomic environment has improved.
Make suggestions wherever appropriate. For example: I would strongly recommend more timely purchase of necessary inputs so as to avoid such problems in future.

Give a proper conclusion e.g. the report clearly shows that food production at Mpumelelo farm is on an upward trend.

NARRATIVE COMPOSITION.

NARRATIVE COMPOSITIONS

A narrative composition is a kind of writing were a candidate re-tells a story or an event that happened in the past.
NB: The aim of the writer is to catch the attention and interest of the reader at the same time stay within the given topic. The strength of a good narrative composition is to arouse the reader’s curiosity, anxiety and to keep the reader suspended until the climax of the story.

Typical narrative question.
 2) Write a story based on either one of the following:
Either a)
Or b)
You are free to write you own story here. It could/should even contain a lot of descriptions making it a narrative-descriptive composition but it still has to be a story that fully brings out the meanings of expressions made in the part of the question you chose. Do not answer both questions only answer a single part and make sure you number the answer you give correctly. The answer you give must clearly make sure the expression is an integral part of the story and not some afterthought. For example if the question was given as below:
Either a) If only I had been an adult
Or b) All hope was lost
For a) the key incident in your story must clearly show what happened could have been averted had you been an adult or it could have turned out differently at the very least. You could talk of, for instance, how you had an abusive father who abused you and your mother regularly, resulting perhaps in her untimely death and a life of hardship for yourself all which can be traced to that period. Clearly you could have stopped this had you been an adult, but it is all wishful thinking! You cannot write a story where you are an adult and seek revenge because that is not what you are being asked to do. If is an unreal conditional here. Nor can you write some other story and tack the statement either at the end or somewhere in the story.

 How to write a narrative composition
As part of your English Language Paper 1 examination you will be presented with the option to write a narrative essay or composition. Narrative essays tend to be very popular amongst students as the topics are usually approachable when compared to other options. This does not mean that narrative compositions are the easiest. Far from it! They are some of the most poorly answered questions in examinations.
A narrative composition question requires you to write a story. Narrative compositions have the following essential elements:
A point of view and a point of view character. This means the perspective from which the story is written. Usually stories are written from the author’s point of view where the candidate has to make ample use of the pronoun I. However this is not always the case and you should always take your cue from the question. For example:
Write a story based on one of the following:
Either a) His past had finally caught up with him.
Or b) After all the embarrassing things I had done, I never expected my parents to forgive and welcome me back home
The first question requires that you write the story from the point of view of some other character (he), it is up to you to provide a name and flesh him up. The second question requires a first person point of view where you will write the story as the main character.
Characters: Most stories require at least one character (the Point of view character above). A good story usually has more than one well developed characters who play important roles in furthering the plot of your story.
Plot: This is the sequence of events in the story. Always take care to include only relevant events in your composition otherwise it will become bloated with unnecessary details which increases the chance of you making errors. Often plots are characterized by conflict amongst the main characters in the story i.e. the protagonist and the villain, this is especially true in one word questions for example Love.
Setting: i.e. the place where the events in your story takes place. You should use imagery to quickly create the setting. Does the story take place indoors or outdoors? Is it in a small town or in the countryside? Here the candidate should demonstrate their descriptive skills.
Dialogue: Dialogue takes place between the characters of the story. Unless you are good with your punctuation you should avoid direct speech like a plague and instead rely on reported speech otherwise you will lose valuable marks due to punctuation errors.
Suspense: You should avoid cliffhangers i.e. needless suspense. You should carefully resolve and tie up all loose ends in your story especially those that have a bearing on the question. Consider the question above: His past had finally caught up with him. While suspense is a good thing you will lose valuable marks if, you say for example, fail to bring out the past that is supposed to have caught up with the main character in the story because it is a central requirement.

How to write the story

1. Choose a topic you are familiar with. It will do you no good to write about a story about a place you have never been to or a concept you are not acquainted with. For example if a story takes place in the country and you are a city person you would do well not to choose that topic.
2. Analyse and understand the topic taking careful note of all the key requirements in the story. For example if the title says: Write a story based on the following statement: Crime does not pay. Your story has to include an element of an actual crime i.e. an act that goes against the law. Disobeying one’s parents is not a crime for example. Secondly you have to show that crimes always have consequences.
3. Brainstorm by listing down ideas that come to mind. Order is not important at this stage.
4. Rearrange the ideas in a logical order. With stories this usually means in chronological order.
5. Using each idea form a topic sentence and flesh it up with details.
6. Write out the story making sure you give it a fitting introduction and conclusion.
7. Revise your story! This is important as often enough what you wanted to write/what you thought you wrote is not what you would have actually written.
8. Take care to do all these things in the set time.
9. Take care to use a consistent point of view.
10. Take care to use discourse maker, conjunctions and good punctuation.
11. Take care to be consistent with your tenses.


A narrative composition, like all other compositions has three parts namely introduction, body and conclusion.

Introduction
There are many ways of introducing a narrative composition, the candidate can:
         i.            Start by introducing the topic or question in the first line or sentence e.g. the accident I will never forget happened on…..
       ii.            Use direct speech or words from a character or person used in the story e.g. “police, police, please come to Masuwe river….” Cried Thabani as he tried calling the police using his cellphone.
      iii.            Anytime of the day, e.g. early in the morning… or late in the middle of the night….
     iv.            An action by any character in the story e.g. Jane woke up…

In introductions avoid the following: using phrases that have been used mostly in the past it bores the Examiner e.g.: it was during the holiday…, it was on Tuesday afternoon…, it was…. Instead the candidate can begin by writing: During the holiday…., On a Tuesday afternoon….

Body
Within the body of the composition the candidate should be able to keep the story interesting.
Narrative compositions calls for strong imagination (create mental pictures in the reader’s mind) and creativity (sensitive scenarios).
It would even be more interesting if the candidate would be able to explore the reader’s five senses (sight, taste, smell, hearing and touching).
Use discourse markers in a narrative writing, these can be used at the beginning of a paragraph or inside a paragraph or at the beginning of a sentence.
Examples (however, although, also, likewise, firstly, in addition, somehow, another point, secondly, finally, thirdly, the third issue is, moreover, therefore etc.)

Conclusion
A conclusion ties up the story thus in a narrative composition the candidate can conclude in any way he or she like as long as the conclusion sums up the story. The writer can use actual words of the character e.g. “oh shit, the devil is gone.” These were his last words as he turned, slung his gun and paced like a defeated soldier.
A candidate can conclude by using a question e.g. “A narrow escape, was it? Who would have thought that one could cheat death in such a way?”



Wednesday, 29 June 2016

VOLCANICITY AND EARTHQUAKES


·         Volcanoes are openings or cracks in the earth's surface that allow molten magma (or other material) to escape from the mantle beneath. Volcanoes are most well-known for releasing lava, but they may also release volcanic ash, rocks and gases.

Distribution of Volcanoes

·         As can be seen on the map below, the earth's active volcanoes are located in specific areas, including:
·         Around the edge of the Pacific Ocean
·         Down the centre of the Atlantic Ocean
·         In Southern Europe
·         Down the east coast of Africa
·         The reason for the distribution of volcanoes, is that they are located on or near tectonic plate boundaries, specifically destructive and constructive boundaries.
·         There are a few exceptions in the middle of the Pacific Ocean, noticeably on the islands of Hawaii. These volcanoes are caused by hotspots. The east coast of Africa is also not a plate boundary, but rather a plate (African Plate) ripping itself in half creating a rift valley lined by volcanoes.
·         Because volcanoes are normally found on plate boundaries their spatial concentration is limited. Their areal extent is also normally limited to areas immediately around the volcanoes, although volcanic ash clouds can potentially have global impacts by disrupting air travel and causing climate change.
·         Ring of fire: This is the name commonly given to the area around the Pacific Ocean. It gets its name because it has the biggest concentration of volcanoes.
·         Hot spots: These are volcanoes that are not found on plate boundaries. The most common explanation in mantle plume theory. This is when hot magma melts the crust above and escapes. Because tectonic plate are constantly moving, but mantle plumes stay stationary they normally create a chain of volcanoes e.g. the islands of Hawaii.

Key Volcanic Terminology

·         Lava: Molten rock above the surface of the earth.
·         Magma: Molten rock below the surface of the earth.
·         Magma Chamber: A store of magma found below the surface of the earth. When the pressure becomes to great in the magma chamber, volcanoes occur.
·         Vent: The main passage by which magma travels from the magma chamber to the crater. You can also get smaller secondary vents that often split off from the main vent.
·         Crater: A large hole or depression that has been created by a volcano. Lakes will often form in the bottom of lakes, they are known as crater lakes.
·         Eruption: A release of volcanic lava, ash or gas.
·         Active volcano: A volcano that regularly erupts and has erupted in recent history.
·         Dormant volcano: A volcano that has not erupted recently, but may erupt again in the future. It is unclear how long a volcano has to be dormant, before it is classified as dormant.
·         Extinct volcano: A volcano that will not erupt again in the future. It is unclear when an active or dormant volcano becomes extinct. Some people argue its is extinct if there is no reordered eruptions, others if it has not erupted for 10,000 years.
Volcanic Hazards
·         Volcanoes can cause multiple hazards (both primary and secondary hazards). Each hazard can have varying impacts. Below is a summary of volcanoes major hazards and their likely impact:
·         Primary Hazards: Hazards that are a direct result of the eruption and are caused by the released of substances during the eruption.

·         Lava Flow: The most commonly associated hazard with volcanoes. Lava flows are simply rivers of molten rock. Viscous (thick) lava flows are very slow, which means most lava flows can be avoided by humans. However, they can cause massive damage to land and property and trigger fires.

·         Tephra (Lava Bombs): Any material that is ejected from a volcano during an eruption. As long as you are standing a safe distance, humans should not be effected by tephra although they can damage buildings and start secondary fires.
·         Pyroclastic Flow: Probably the most dangerous of all volcanic hazards are pyroclastic flows which are superheated clouds of ash, gas and small tephra. They can travel at speeds up to 500km/hr and incinerate anything in their path.
·         Ash Cloud: Ash clouds are normally released into the atmosphere. Although they don't pose much immediate danger they can disrupt air travel and when the ash falls to ground it can crush buildings and bury farmland and also cause the secondary hazard of acid rain.
·         Poisonous Gases: Often released before a major eruption these gases can be deadly to animals and humans if inhaled in sufficient quantities.
·         Secondary Hazards: Hazards that happen as a result of primary hazards.
·         Lahar (mudslide): Volcanoes ash and/or lava can cause snow to melt or they can mix with river/rain water and create mudslides, commonly known as lahars.
·         Acid Rain: Gases released during an eruption e.g. sulphur dioxide can mix with water vapour in the atmosphere and create acid rain which can damage buildings and change the pH of soils and lakes killing plant and animal life.
·         Climate Change: Gases released into the atmosphere e.g. Sulphur dioxide can enhance the greenhouse effect causing global warming. However, ash released into the atmosphere can also absorb or reflect incoming solar radiation and reduce global temperatures.
·         Fires: Tephra and lava flows can start fires which can cause widespread damage to buildings and land.
·         Predicting and Measuring Volcanoes
·         Volcanoes are easier to predict than earthquakes, volcanologist can try and predict volcanoes by looking for:

ü  Changes in the shape of a volcano
ü  Changes in the amount of gas being released
ü  Changes in the temperature
ü  Tectonic activity (earthquakes)
ü  Animal behaviour
ü  Changes in local hydrology
ü  Mass movements

Because there are many types of volcanoes and types of volcanic hazard, it is hard to compare one volcano with another. However, one method that has been used is the volcano explosivity index (VEI) shown to the right.. The scale is open-ended and measured by looking at:

ü  Volume of material released in eruption
ü  Cloud height and
ü  Qualitative observations
All material released (tephra, ash, etc) is all treated the same when calculating volume. The largest volcano over recorded in history was an 8.0 (Yellowstone and Toba). Both of these eruptions were classified as super volcanoes with a frequency of 10,000 years.

Key Earthquake Terminology

ü  Epicentre: The location on the earth's surface directly above the hypocentre.
ü  Hypocentre (focus): The actual site/location that an earthquake takes place.
ü  Aftershock: A smaller earthquake that takes place in the coming hours, days and weeks after the main earthquake.
ü  Seismic Waves: These are waves of energy that travel through the earth as a result of an earthquake. There are two types of waves; body waves that travel through the earth and can be divided into p-waves (more longitudinal) and s-waves (more transverse) and surface waves that travel across the surface.
ü  Tremor: A tremor is another name for an earthquake, but is all sometimes the name given to a lesser earthquake or the felt effects of a big earthquake by people living further from the epicentre.
Earthquake Hazards

Primary Hazards
Ground Shaking: The movements of the ground caused by the seismic waves can fell buildings, bridges, trees, etc. killing and trapping people.

Secondary Hazards

Tsunamis: The sudden shifting of tectonic plates under the sea can displace large amounts of water which can trigger massive tsunamis. The 2011 Japanese tsunami and the 2004 Indian Ocean tsunami both caused more deaths than the earthquakes that triggered them.

Fire: Earthquakes can break gas cables and knock over ovens and open fires which trigger secondary uncontrolled fires.

Liquefaction: This is where a saturated soil loses strength and rigidity because of applied stress, normally an earthquake. The changes in its state causes the ground to behave like water allowing things to sink into it. The recent earthquake in Christchurch New Zealand saw large scale liquefaction

Mass movements (landslides): The sudden movement of the earth and subsequent seismic waves can trigger landslides and avalanches which can bury and kill many people. The El Salvador earthquake of 2001 triggered a landslide in Santa Tecla which killed hundreds of people.
Floods: damage to flood defenses or even dams can cause widespread flooding.
Factors Affecting the Impact of Earthquakes
Depth: If the hypocenter of an earthquake is close to the surface then it is more likely to cause greater damage than a deep earthquake.
Duration: A longer earthquake is likely to cause greater damage than an earthquake that lasts only a few seconds.
Magnitude: Obviously a stronger earthquake is going to have a greater impact than a weaker one.
Time of Day: Time of day can be important. If people are sleeping and get trapped in their beds more people can be killed. In Japan an earthquake that struck while people were cooking their evening dinner caused widespread secondary hazards (fire) that caused more deaths.

Epicentre Location: If the epicentre of an earthquake is an uninhabited region it is going to have a lesser effect than one under a densely populated city.

Geology: If an earthquake occurs in solid bedrock it is likely to cause less damage than one centred below an alluvial floodplain which may lead to liquefaction.

Economic Development (buildings, planning, preparedness): Generally speak more developed countries have better zonal planning, building codes and preparedness mean the effects of the earthquake are less.

Can humans cause an earthquake?
Predicting and Measuring Earthquakes

Earthquakes are extremely hard to predict. Scientists can normally predict where earthquakes are likely to happen, but they can not predict when they will happen and how strong they will be. Scientists can attempt to predict by looking at:
ü  Microearthquakes
ü  Changes in rock stress
ü  Ground subsidence, uplift or tilt
ü  Changes in magnetic field and electrical resistivity of rocks
ü  Animal behaviour
ü  Seismic history
Richter Scale: The Richter Scale was developed by Charles Richter in 1935. It uses a base 10 logarithmic scale. The scale is normally seen from 0-10, but in theory could go above this. The scale measures the amplitude of waves on a seismograph. An earthquake of 5.0 is ten times stronger than one of 4.0. The largest earthquake ever recorded was a 9.5 of the coast of Chile in 1960.
Seismograph: The name commonly given to seismometers. It records movements in the earth caused by seismic waves. A picture of a seismograph is shown to the right.


Mercalli Scale: Instead of measuring an earthquakes energy like the Richter scale the Mercalli scale looks at the effects of an earthquake. The scale goes from 1 (hardly felt) up to 12 (total destruction). The scale is obtained by looking at the effects on humans, nature and structures.

MAJOR LANDFORMS



We all know that one – fourth of the earth’s surface is covered by land. The portion which forms land on earth’s surface is not the same everywhere. At some places the land may be too high, at some places very low, some areas would be lush green and certain areas are dry and barren. Our planet earth is a beautiful collaboration of various physical features.

These different physical features are called the various landforms on the surface of the earth. These are geographical features that control the ecosystem, climate, weather and the essence of life on earth. In simple terms, we say that any shape on the earth’s surface is known as a landform. The various landforms that we have, came into existence due to natural processes such as erosion, wind, rain, weather conditions such as ice, frost and chemical actions. Natural events and disasters such as earthquakes (the tectonic plates) and eruption of volcanoes created the various shapes of the land that we see.

The different major landforms are mountains, hills, valleys, plateaus, plains and deserts.

Facts about Mountains
·         A mountain is the highest landform on the surface of the earth. It is usually found to be conical in shape with steep sides and a pointed tip called a peak.
·         As compared to their surroundings, mountains are high points on the surface of the earth.
·         Mountain range is a series of mountains.
·         Mountains could be steep and snow covered or they could be gently sloping having rounded tops.
·         The highest mountain range in the world is the Himalayas. Some mountains are found under the sea and could be taller than the Mount Everest, which is the highest mountain peak in the world.
4 Types of Mountains
Ø  Volcanic Mountains
Ø  Fold Mountains
Ø  Block Mountains
Ø  Residual Mountains
·         Mountains could be formed when molten rocks from deep within the earth rise to the surface, pouring out in the form of lava from volcanoes.
·         Sometimes the tectonic plates on the earth’s crust move towards each other, the sediments deep below the earth’s surface are squeezed up to form mountain ranges.
·         There are many mountains that remain covered with snow throughout the year. These mountains are very cold and hence there is not much vegetation or life found in these hills. Trees like pine and conifer are found in the lower ranges or foothills.
·         Animals that have a thick fur coat can survive the extreme cold in the high mountain regions. The yak, the mountain puma, snow leopard or the male goat called the ibex are some of the animals found in the mountain areas.
·         Houses in the mountains have sloping roofs to enable the snow slide off easily. The houses are made of wood so that they remain warm. People usually work in small industrial units, farming and animal rearing form their main occupations.
·         Even besides harsh conditions, mountains are very useful to us as they act as shields for the country blocking the cold winds and also protect us from invading enemies.
·         Trees provide us with commercial and medicinal value.
·         Melting snow from the snowcapped mountains fills the rivers and they are a source of water.
·         They make beautiful tourist destinations.
Facts about Hills
·         Hills are lower than mountains but are higher than their surrounding areas.
·         Hills are lower in height than mountains, but they are higher than the surrounding areas. A number of hills together form a ‘range of hills’. Hills are usually covered with grass.
·         The climate in the hills is more pleasant than the climate in high snow covered mountains. It is usually neither too hot nor too cold. They make perfect tourist destinations.
·         The vegetation is thick, beautiful fruit orchards are found in the hills and it is good for crop cultivation like tea and coffee.
Facts about Valleys
·         Valleys are the low-lying areas between two mountains or hills.
·         When rivers flow down the mountainsides and hillsides, it wears off the rocks and soil. Over a period of time, the water carves out v- shaped grooves. These grooves get deeper and wider, finally forming low land areas called valleys.
·         Valleys formed by glaciers are U- shaped valleys.
·         Valleys formed due to the effect of erosion are V – shaped valleys.
·         The valleys formed (that is V shaped or U shaped), depend upon the rate at which deepening and widening takes place.
·         Narrow valleys are called canyons.
·         The climate in the valleys is pleasant and favourable for living, hence many civilizations in ancient times were found in valleys where there were rivers flowing making water available for the people.
·         For example The Indus Valley Civilization that came up near the River Indus.
·         Due to ample water that is provided by the rivers and fertile soil, the vegetation is thick and valleys look green and beautiful.
·         They make great tourist destinations as well.
·         In Young Mountain areas the valleys found are steep sided.
Facts about Plateaus
·         A plateau is a flat topped highland with steep sides. Since it looks like a table, it is also called a tableland. They are basically areas of high flat land.
·         Plateaus are usually surrounded by steep rock faces called cliffs.
·         Some plateaus like the Plateau of Tibet lies between mountain ranges.
·         Plateaus are usually good for growing certain crops.
·         Plateaus are formed when magma pushes up towards the surface of the earth’s crust. This magma does not break through but it raises a portion of the crust up creating a plateau.
·         There are certain kinds of plateaus like the butte and the mesa. These are special kinds of plateaus.
Facts about Plains
·         Plains as you all are familiar with are areas of flat land.
·         The plains usually meet the oceans or seas, these are called coastal plains.
·         In India, we have the Eastern Coastal Plains and the Western Coastal Plains.
·         Some plains are formed by the action of rivers, these are called river plains.
·         In India the Northern Gangetic Plain is a river plain.
·         River plains are very fertile and good for growing crops.
·         You will find most big cities are located in plains. This is because it is easier to build houses, buildings, roads and other structures in the plains. Hence they are heavily populated.
Facts about Islands
·         An island is a piece of land surrounded by water on all sides.
·         The continent of Australia is an island.
·         Islands are formed due to volcanic activity or due to hot spots in the lithosphere.
·         Coral islands are formed when the skeletal material of the corals piles up over a long period of time. These look beautiful.
·         A large group of islands close to each other together form an archipelago. The Lakshadweep islands are an example of an archipelago. The largest archipelago in the world is Indonesia.
Deserts : Facts and Types
·         Deserts are large, dry and hot areas of land which receive little or no rainfall throughout the year. The vegetation is scanty due to the shortage of water. Deserts are covered with sand.
·         Sand dunes are formed in deserts. Sand dunes are huge hills of sand formed by the winds.
·         Deserts have extreme weather conditions, days could be very hot and nights very cold. This is because the sand absorbs heat fast during the day and gives off heat quickly at night.
·         The main vegetation found in the deserts are the cacti and the baobab trees.
·         The baobab tree can store nearly up to 1000 litres of water in its trunk which enables it to survive the harsh conditions.
·         There are two types of deserts – Hot Deserts and Cold Deserts.

Hot Deserts
·         As the name suggests, hot deserts are vast areas of land that are covered with sand and dust. These areas receive little or no rainfall and are very dry.
·         The animals found in the hot deserts are camels, snakes, lizards and rats.
·         Thar Desert in India is a hot desert.
Cold Deserts
·         The cold deserts are large areas of land covered with snow. These deserts receive little or no rainfall. They receive snowfall during the winters. Animals such as penguins, whales and fur seals survive in the cold deserts.
·         The Antarctica is the world’s biggest cold desert.
·         Life in these cold deserts is impossible.
·         There are some rocky deserts like the Gobi desert in Asia.
·         Some other Landforms
·         Peninsula
·         A peninsula is a piece of land that is surrounded by water from three sides. For example the southern part of India is a peninsula as it is surrounded by the Arabian sea, Bay of Bengal and the Indian ocean and is joined to land on the fourth side.