Question

_____refer to the things that exist freely in nature.
2. during the_____ period ,earth was covered with swampy forests.
3.______is used to generate power and to manufacture other fuels like coal and coal tar.
4 ._____is a mixture of hydrogen,methane,carbon monoxide,and other gases
5.natural gas mainly consist of ______.
6.______are the chemicals derived from petroleum and natural gas .
7. the process of refining of petroleum is carried out in refineries and is called _______​

Answer 1

Answer:

1. Natural resources

2. Carboniferous

3.

4. Atmosphere