Question

What is true about a fuel? Select all that apply.

Gasoline and wood are two examples of fuels.
A fuel is something that burns.
Water is a fuel.
It is hard for fuels to burn.
Fuels need oxygen in order to burn.

Answer 1

True:
- Gasoline and wood are two examples of fuels.
- A fuel is something that burns (i.e., a substance that can undergo combustion and release energy).
- Fuels need oxygen (or, more generally, an oxidizer) in order to burn.

False:
- Water is a fuel. (Water is a combustion product, not a fuel.)
- It is hard for fuels to burn. (Most fuels are combustible under the right conditions.)