Question 1
- What are anabatic winds?
- Give three factors which influence the direction of the wind
Answer
- They are cold local winds which blow from valley bottoms up the valley to the hill tops
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- Due to coriolis force where wind is deflected by earths rotation
- Surface of the earth has several obstacles which block / divert the wind’s directions
- Due to existing anticyclones which are areas of diverging air / wind moves from a region of high pressure to a region of low pressure
Question 2
- Define the solar system
- State any FOUR proofs which show that the earth is spherical
Answer
- - It is the group of heavenly bodies;the sun and the eight planets
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- Photographs taken from space by satellites show that the earth is spherical
- The shadow of the earth during the eclipse of the moon is spherical – shaped.
- The circumnavigation around the earth facing one direction you will appear from the opposite direction.
- All other planets are spherical, earth being one of them, must also be spherical
Question 3
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The diagram below shows features as a result of glaciation. Use it to answer the questions that follow
i) Identify the features labeled M and N
ii) Name two processes through which feature marked R is formed - How does the gradient of the land affect ice movement
Answer
-
i)
M - Aretes
N - Tarn / cirque lake / corrie lake
ii) (R is a arque)
- Plucking
- Abrasion - - Ice moves faster on steep slopes than on gentle one since the effect of gravity is greater on steep slopes
Question 4
- Name TWO examples of organically formed sedimentary rocks
- Outline TWO methods used in estimating the age of rocks
Answer
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- Chalk
- Limestone -
- Radiocarbon dating
- Absolute dating / counting of laminae
- Relative dating
Question 5
- Differentiate between oceans and seas
- Give TWO causes of vertical movement of ocean water
Answer
- - An ocean is a large and extensive body of saline water occupying a basin between continents while a sea is a large body of saline water on the margins of continents
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- Differences in the density of the water
- The convergence of ocean currents