Rocks and Minerals

What are rocks made of?

• Water

• Minerals and other materials

• Air

• Plants

What is a mineral?

• A natural liquid

• A natural solid

• A type of rock

• A kind of gas

How do scientists group rocks?

• By size

• By color

• Into three types: igneous, sedimentary, and metamorphic

• By weight

What is an igneous rock?

• A rock that has been changed

• A rock that forms when melted rock cools

• A rock made from shells

• A rock found in rivers

What do we call melted rock that comes out of the ground?

• Water

• Lava

• Sand

• Soil

What happens to lava when it cools fast?

• It makes small crystals or glass

• It turns into gas

• It disappears

• It becomes hot again

What is an intrusive rock?

• A rock that forms on the surface

• A rock that forms when melted rock cools underground

• A soft rock

• A rock made of sand

Are the crystals in intrusive rocks big or small?

• Big

• Small

• None

• Tiny