Nature_Medium

1. A thick, black liquid that is extracted from the ground and used to make fuel is called ______.

• 1. natural gas

• 1. crude oil

• 1. minerals

• 1. fossil fuels

1. Which of the following is a renewable source of energy?

• 1. coal

• 1. solar power

• 1. gas

• 1. uranium

1. Which of the following is a non-renewable source of energy?

• 1. wind power

• 1. natural gas

• 1. hydropower

• 1. solar power

1. Solid materials that are found naturally in the earth's crust are called ______.
   

• 1. air pollution
     

• 1. chemicals
     

• 1. greenhouse gases
     

• 1. minerals

1. Fuels that are formed from the remains of plants and animals over millions of years are called ______.
   

• 1. free fuels
     

• 1. chemicals
     

• 1. fossil fuels
     

• 1. renewable fuels

1. A long period of low rainfall that can lead to water shortages and crop failure is called a ______.
   

• 1. flood

• 1. heatwave

• 1. drought

• 1. hurricane

1. A period of excessively hot weather that can be dangerous to human health is called a ______.
   

• 1. drought

• 1. flood

• 1. heatwave

• 1. hurricane