Types and Formation of Rocks

What do you call a person who studies the Earth and its rocks?

• Biologist

• Geologist

• Zoologist

• Astronomer

What are sedimentary rocks made from?

• Melted rock from volcanoes

• Tiny pieces of sand, shells, and pebbles

• Shiny crystals

• Hardened lava

Which type of rock is usually the only one that can have fossils inside?

• Metamorphic rocks

• Igneous rocks

• Sedimentary rocks

• Crystal rocks

How are metamorphic rocks made?

• From tiny pieces of sand and shells

• From melted rock that cools down

• From intense heat and pressure deep inside the Earth

• From layers of dirt and plants

What do metamorphic rocks often have inside them?

• Fossils of old animals

• Ribbon-like layers and shiny crystals

• Soft, crumbly pieces

• Smooth, round shapes

What is magma?

• Melted rock deep inside the Earth.

• Melted rock that comes out of a volcano.

• A type of shiny rock.

• A rock with tiny holes.

What is lava?

• Rock that cools slowly inside the Earth.

• Melted rock that flows out of a volcano.

• Gas bubbles trapped in rock.

• A type of rock that is soft.

How do intrusive igneous rocks form?

• When lava cools very quickly on the Earth's surface.

• When magma cools slowly inside the Earth.

• When gas bubbles get trapped in the rock.

• When rocks are layered and dense.

Which of these is an example of an intrusive igneous rock?

• Basalt

• Pumice

• Obsidian

• Granite

What happens when lava cools very fast on the Earth's surface?

• Large crystals form.

• It becomes a plutonic rock.

• It doesn't leave much time for crystals to form.

• It forms deep inside the Earth.