Understanding Rocks and Soil

What is a rock?

• A living animal

• A natural, solid, nonliving material made from one or more minerals

• A type of plant

• A liquid found underground

What is soil?

• Melted rock

• The layer of loose material that covers Earth's land

• A type of mineral

• A kind of animal

Which type of rock forms when existing rock is changed by heat and pressure?

• Igneous

• Sedimentary

• Metamorphic

• Loam

How does igneous rock form?

• When sediments are pressed together

• When melted rock cools and hardens

• When plants decay

• When rocks are broken by wind

What is loam?

• A type of rock

• Soil that contains a mixture of humus and mineral materials of sand, silt, and clay

• Melted rock

• Only sand

What is a mineral?

• A living thing

• Natural, nonliving material that makes up rocks

• A type of soil

• A kind of plant

How does sedimentary rock form?

• When melted rock cools

• When sediments are pressed together and cemented

• When rocks are heated

• When plants grow

What are the three types of rock?

• Sand, silt, clay

• Igneous, sedimentary, metamorphic

• Loam, humus, mineral

• Topsoil, subsoil, bedrock

What makes up soil?

• Only water

• Particles of rocks, air, water, and humus

• Only sand

• Only minerals

Which type of soil holds the most water?

• Sand

• Silt

• Clay

• Loam