E Answer the following questions.
1. Differentiate between the P Wave and the S-Wave.
2.
Write two characteristics of each of the following:
(a) Crust (b) Mantle (c) Core
3.
What are fossil fuels? Name any two fossil fuels and specify their importance
4. Why is the knowledge of the earth's interior based on indirect observation?
5. What are minerals? On what basis can the minerals be identified? Give example
Answers
Answer:
1 = P waves travel through any kind of material, whether it is a solid, liquid or gas. On the other hand, S waves only move through solids and are stopped by liquids and gases.
3 = Fossil fuels principally consist of carbon and hydrogen bonds. There are three types of fossil fuels which can all be used for energy provision; coal, oil and natural gas. Coal is a solid fossil fuel formed over millions of years by decay of land vegetation.
4 = Knowledge of the earth's interior is based on indirect observation as it is impossible to collect data regarding the earth's interior, we can't dig on such a great extent ,as their is intolerable heat deep inside the earth and it is impossible for any organism to survive their.
5 = Minerals are natural chemical compound, uniform is structure and composition. They are obtained from rocks having one or more minerals. They are identified on the bases of their colour,hardness and lusters eg iron,silver etc.
sorry I don't know the answer of 2 question
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