Question 1
- Name three types of coral reefs.
- What are the benefits of coral reefs in the areas they have developed
Answer
-
1. Barrier reef
2. Fringing reef
3. Atolls reef -
- Sheltered water encourages growth of plankton /fish food.
- Shallow Corals are a tourist attraction earning a country foreign exchange.
- Corals form a base of mining of limestone used in cement manufacture
Question 2
-
The diagram below represents features of intrusive vulcanicity.
Name the features marked P,Q and R
- How is a caldera formed?
Answer
-
P - Batholith
Q - Laccolith
R - Lopolith -
- As a result of subsequent violent eruptions leaving an enlarged crater
- Subsidence where the weight of the cone collapses into magma chamber
Question 3
- Name the three main layers of the atmosphere from the earth’s surface upwards
- What is temperature inversion
Answer
-
1. Troposphere
2. Stratosphere
3. Mesosphere - - A condition in the atmosphere where upper layer of air is warmer than the lower layer
Question 4
- Highlight any three factors that necessitate the occurrence of an artesian basin
- Apart from lakes rivers and sea, name any other two sources of underground water.
Answer
-
- The aquifer must lie between two impermeable rocks
- The aquifer must outcrop in a region which is a source of water
- The aquifer must dip from a region of water intake and the rock layers must form a broad synchine or basin. -
- Rain water
- Melt water
- Manmatic water
Question 5
- Below is a diagram showing the structure of the atmosphere
Name the parts labeled a, b, and d.
- State the reasons for the behavior of graph at zones b and c.
Answer
-
a. Troposphere
b. Stratosphere
c. Thermosphere /ionosphere. -
– Temperature increases with altitude.
– There is no change in temperature with increase in height.(isothermal zone).