Chemistry Review (8th grade, ch. 13)

Please answer the following questions briefly.
1. What is meant by fossil fuel?
2. What are the uses of fossil fuels?
3. Please mention 3 fuels which are taken from fossil fuels?
4. What is cracking?
5. Please mention the fossil fuels problems which we are facing?
6. What are the solutions to those problems?
7. How is fossil fuel formed?