Natural Resources

Anything useful or necessary for living beings that occurs naturally on Earth are ________.

• pollution
• conservation
• natural resources
• conservation

Resources that nature CAN replace when they are used.

• renewable resources
• nonrenewable resources

Resources that nature CANNOT replace after they are used. 

• renewable resources
• nonrenewable resources

Which is NOT an example of a renewable resource?

• plants
• air
• water
• soil

Which is NOT an example of a nonrenewable resource?

• oil
• fossil fuel
• sunlight
• coal

A fossil fuel is an energy source formed deep inside Earth from the remains of organisms that lived long ago. Which is an example of a fossil fuel?

• soil
• sunlight
• water
• natural gas

Fossil fuels are MOST often found ______.

• near the ocean's surface
• in desert and sand dunes
• near the African coast
• deep underground

When people grow certain plants in water or other materials, such as sand and gravel, is known as _________.

• hydroponics
• contour plowing
• intercropping
• crop rotation

When farmers rotate crops every other year in order to return nitrogen to the soil is known as _________.

• hydroponics
• contour plowing
• intercropping
• crop rotation

When farmers plant more than one crop in the same field at the same time is known as _________.

• hydroponics
• contour plowing
• intercropping
• crop rotation