Question

When were fossil fuels formed(1 point)
Responses

less than 100 years ago
less than 100 years ago

hundreds of years ago
hundreds of years ago

millions of years ago
millions of years ago

billions of years ago
billions of years ago
Question 2
Using the graph below, answer the following question(3 points)
The primary sources of energy in the most recent century are ,
,
and

Answer 1

Fossil fuels were formed **millions of years ago**.

For Question 2, without a specific graph provided, I can't give the exact sources of energy. However, in the most recent century, common primary sources of energy have typically included:

1. **Oil**
2. **Natural Gas**
3. **Coal**

You may need to refer to the graph to confirm these or identify others as applicable.