Types of Rocks

Which is the only type of rock that can contain fossils?

• igneous

• metamorphic

• sedimentary

Why will intrusive igneous rocks have big mineral grains?

• magma cools very slowly and big crystals form

• there is a lot of heat and pressure added to the rock

• water deposits large minerals near a volcano

• lava cools very quickly on the surface of the Earth

Sedimentary rock is formed from_________.

• cooling of magma or lava

• melting

• compacting and cementing

• heat and pressure

Metamorphic rock is formed from _________.

• melting

• weathering and erosion

• compacting and cementing

• heat and pressure

Igneous rock is formed from ___________,

• cooling of magma or lava

• heat and pressure

• compacting and cementing

• weathering and erosion

What makes holes and a glass-like look to igneous rocks?

• magma cooling quickly inside the earth

• compacting of sediment

• lava cooling quickly on the surface of the earth

What causes igneous rock to have tiny holes (vesicular texture)?

• cementing of sediment

• pressure that makes layers

• gas bubbles that were trapped in lava as it cooled

This is Pumice. This is an __________ igneous rock because it cooled very quickly and produced holes.

• intrusive

• extrusive

What are sedimentary rocks made of?

• Sediments, fossils and clay

• Sediments, Dead organisms and fossils

• Fossils, dead organisms, clay

What does SEDIMENT mean?

• Large pieces of rock and soil

• A bunch of rocks

• Small pieces of rock and soil