Question 1
- What is river rejuvenation
- The diagram below represents a river capture.
Name the features marked A, B, C.
Answer
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- River Rejuvenation is the renewal of the erosive activity of a river.
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A – An elbow of capture
B – Wind gap
C – Pirate River / stream
Question 2
- Name two scales used to measure the intensity of earthquakes
- Give three causes of earthquakes
Answer
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- Rossi forred scale
- Mercelli scale -
- Causes of Earthquakes.
- Gravitational pressure.
- Collision of lectonic plates
Question 3
- Name a place in Kenya where tarns are found
- Describe how a tarn is formed
Answer
- Tarns are found on Mt. Kenya.
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- Snow accumulation in a shallow pre-existing hollow on a mountain side.
- Snow gets compacted into the ice to form a cirque glacier.
- Accumulated ice erodes the hollow making it deep and wide.
- Eventually a deep arm-chair shaped depression called a corrie is formed.
- The depression is filled with melt water/rain water to form a lake called tarn.
Question 4
- What is natural vegetation.
- State three characteristics of Mediterranean type of vegetation
Answer
- Natural vegetation is the plant cover that grows naturally/wildly on the earth surface without interference by people or animals
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- Some plants have small thick skinned or spiny leaves.
- Some plants have long roots.
- Some plants have thick barks.
Question 5
- Give the dates in the year when the regions at the Arctic and Antarctic circles experience the longest hours of daylight.
- Use the diagram below to answer the questions that follow
- What type of eclipse is represented by the diagram.
- Name the features marked D and E.
Answer
- Arctic Circle: Around June 21st or 22nd.
Antarctic Circle: Around December 21st or 22nd. -
- Wind
- Running water
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- They are delivered from pre existing rocks
- They are laid down in layers called strata;
- Contains fossils/inorganic matter (Fauna and flora)