Rocks, Minerals, and Soil

How do igneous rocks form?

• From layers of sediments

• From heat and pressure

• From cooled magma or lava

• From plants and animals

What are sediments?

• A. Pieces of plants

• B. Bits of broken-down rock

• C. Hot molten rock

• D. Liquid minerals

Which type of rock can change form because of heat and pressure?

• Igneous

• Sedimentary

• Metamorphic

• All of the above

What is luster?

• A. A rock’s shape

• B. How a mineral reflects light

• C. How heavy a rock is

• D. How a mineral smells

Which property tells how easily a mineral can be scratched?

• Cleavage

• Texture

• Luster

• Hardness

What are the three main rock particles in soil?

• Gravel, sand, and shells

• Sand, silt, and clay

• Clay, wood, and leaves

• Pebbles, dust, and ash

Why does water drain quickly through sandy soil?

• It has no air

• It has large spaces between particles

• It is very hard

• It is full of clay

What is the top layer of soil called?

• Parent material

• Subsoil

• Sediment

• Topsoil