Major groups of rocks

• sedimentary and igneous
• sedimentary, igneous and metamorphic
• metamorphic and sedimentary

Scientists divide rocks into groups based on how they form.

• True
• false

A rock that forms from magma

• igneous
• sedimentary
• metamorphic

Mixture of molten rock and gases that form underground

• lava
• magma
• sedimentary

magma that flows onto the surface

• Lava
• sedimentary
• metamorphic

Igneous rock is formed when molten material cools and solidifies either inside Earth or at the surface.

• True
• False

Intrusive rocks

• Forms at earth's surface
• Has a fine-grained texture
• Forms underground

Extrusive rocks

• Forms underground
• Has a coarse-grained texture
• Cools quickly

The process of _____ breaks down rock at Earth's surface.

• weathering
• clastic rocks
• chemical reaction

When sediment squeezed and cemented together

• sedimentary rock
• igneous rock
• metamorphic rocks