review u10

1. ____________ source of energy is the source that can’t be replaced after use.

• Renewable   

• Natural         

• Effective 

• Non-renewable

If everyone ____________ fossil fuels, they will quickly run out.

• protects

• wastes  

• consumes   

• saves

Non-renewable energy sources will run out because they are ____________.

• helpful 

• limited    

• harmful

• Unlimited

Solar energy is a green, clean, and ____________ energy source.

• polluting

• non-renewable 

• renewable

• recyclable

Nuclear energy is not ____________ and it is not green because of radioactive waste.

• safe     

• dangerous  

• polluted      

• cheap

Hydro power is the most efficient way to ____________ electricity in many countries.

• create 

• waste 

• generate

• turn

Renewable energy sources are better for the environment and they will not ____________.

• run out  

• rely on

• turn off   

• put on

I can ____________ much energy by turning off the TV when not watching it.

• use

• make

• spend

• save

Instead of using electricity to make wind - like a fan - wind turbines use ____________ to make electricity.

• oil  

• solar

• wind  

• water

Do your parents ____________ coal as well as wood to make a fire for cooking?

• burn

• heat   

• reserve 

• produce