Unit 5 Test

To use old things to make new things

• recycle

• reduce

• conserve

A large body of salty water

• stream

• river

• ocean

A body of water with land all around it

• river

• lake

• ocean

Which is NOT a natural resource

• plants

• animals

• soil

• paper

What is soil made of?

• small pieces of rock and once-living things

• anything from nature that people can use

• a hard, nonliving thing that comes from the ground

What is conservation?

• saving resources by using less

• making new resources

• wasting resources

What part of soil has tiny bits of rock that stick together?

• clay

• sand

• silt

What happens to rock as it breaks down into small bits?

• It becomes a plant.

• It becomes part of the soil.

• It changes its color.

How can we use rocks to make a useful product?

• using rocks to build a house

• starting a rock collection

• observing rocks

What do all living things need to live and grow?

• grass

• sand

• water