What of the following is an example of a non-renewable source
a. fossil fuels
b. solar energy
c. wind energy
d. geothermal energy

The vedas were a collection of aryan religious writings t or f

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

What is the thickest layer of earth called?