Unit 6 Science- 3rd Grade

What is a renewable resource?

• a resource that can be replaced easily

• harmful materials

• a resource that can be used up

• something found in nature

Which material is a mixture of water, air, pieces of rock and dead plants and animals?

• soil

• sand

• clay

• humus

What is something that comes from nature that people use?

• conservation

• fuel

• pollution

• natural resources

What is conservation?

• making fuels

• putting harmful things in the environment

• saving resources

• throwing trash in the ocean

What do plants take in from the soil through their roots?

• clay

• sand

• nutrients

• rocks

Which would tell all about nonrenewable resources?

• they are fossil fuels

• they must be mined

• they are used for fuels

• they can be used up

Which would list rock particles in order from biggest to smallest particle?

• clay, silt, sad

• silt, clay, sand

• sand, silt, clay

• clay, sand, silt

How have people used cotton and wool?

• to make gasoline

• to make electricity

• to make just for fun

• to make clothing

How can you find out if the soil is sand or silt?

• observe how fertile the samples are

• test the amount of nutrients in the samples

• measure the amount of water in the samples

• observe the size of particles in the samples

When leaves fall off of tress what do they become part of first?

• bedrock

• surface litter

• topsoil

• subsoil