Rock Types Quiz

Igneous Rocks are

• formed when material which has been deposited by agents such as rivers is compacted over time until it hardens into rock.

• formed when molten rock from deep within the Earth’s crust (magma) finds its way into or onto the Earth’s crust where it cools and hardens.

• formed when igneous or sedimentary rocks are subjected to intense pressure and heat over a long period of time.

Answer explanation

Igneous comes from the Latin word igneous 'fiery'. What comes to mind in terms of geography when you hear this?

Sedimentary Rocks are formed when

• material which has been deposited by agents such as rivers is compacted over time until it hardens into rock.

• molten rock from deep within the Earth’s crust (magma) finds its way into or onto the Earth’s crust where it cools and hardens.

• igneous or sedimentary rocks are subjected to intense pressure and heat over a long period of time

Answer explanation

These rocks often have distinct layers that geologists call strata. Sometimes they even contain layers of plants and animals!!

Metamorphic Rocks are formed

• when molten rock from deep within the Earth’s crust (magma) finds its way into or onto the Earth’s crust where it cools and hardens.

• when material which has been deposited by agents such as rivers is compacted over time until it hardens into rock.

• when igneous or sedimentary rocks are subjected to intense pressure and heat over a long period of time

Answer explanation

The term “metamorphosis” is most often used in reference to the process of a caterpillar changing into a butterfly. However, the word “metamorphosis” is a broad term that indicates a change from one thing to another.

Limestone is an example of

Answer explanation

Sandstone, Chalk and Mudstone are all examples of Sedimentary Rocks.

Marble is an example of

Answer explanation

Diamonds, Gneiss and Slate are all examples of metamorphic rocks!

Granite is an example of

Answer explanation

Basalt, Obsidian and Pumice are all examples of Igneous Rocks