Question

Complete the sentence by typing the word that correctly fills the blank Fossil fuels are formed gradually over _____of years

Answer 1

Explanation:

million and million of years

fossil fuels are the evidence which is used to study about the ancient animals and the environment

Answer 2

Answer:

Over 650 million years ago

Explanation:

Fossil fuels were formed millions of years ago when plants, animals and other creatures died and buried under the earth. These remains gradually changed over the years due to heat and pressure under the earth's crust and finally formed into fossil fuels.