e Purell TUCK. D. Give reasons for the following. 1. Igneous rocks are called primary rocks. 2. Rocks develop cracks due to change in temperature. E. Answer these questions. 1. What are rocks? Name the main types of rocks with two examples of each. 2. How are metamorphic rocks formed? Write two characteristics of metamorphic rocks. 3. What is mechanical weathering? How does freezing action of water affect weathering of rocks? 4. Distinguish between oxidation and hydration. 5. Discuss the role of plants and animals in biological weathering. 6. What are soil horizons? Name the soil horizons.
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1 this is because these Rock were the first to be form and are those also called primary rocks
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