How Rocks are Formed

How do igneous rocks form?

• by hardening sediment at the bottom of rivers and oceans

• when heat and pressure deep inside the Earth cause rocks to change

• when melted rock from inside the Earth cools and solidifies

• by wind and water breaking down rocks into small pieces

What are two types of igneous rocks?

• slow and fast

• magma and lava

• extrusive and intrusive

• hard and soft

Where do sedimentary rocks form?

• inside the Earth's surface

• in space and then fall to Earth

• at the bottom of rivers and oceans

• on mountain peaks

How are metamorphic rocks formed?

• by wind and water

• by heat and pressure inside the Earth

• by erosion

• by volcanic eruptions

What is magma called when it reaches Earth's surface?

• sediment

• lava

• metamorphosis

• sedimentary rock

How do extrusive igneous rocks form?

• on the Earth's surface

• under the Earth's surface

• by hardened sediment

• in outer space

Where do small pieces of rocks settle to form sedimentary rocks?

• on mountaintops

• on the bottom of rivers and oceans

• inside caves

• in deserts

How are igneous rocks formed?

• by earthquakes

• by volcanoes

• by tsunamis

• by tornadoes

What happens when a volcano erupts?

• it rains

• it snows

• it spews out hot lava

• it becomes dormant

What causes sediment to harden into rock?

• sunlight

• wind

• pressure and time

• rainfall