Igneous Rocks

Front

What is a dike in igneous rock formation?

Back

A dike is a type of igneous rock formation that occurs when magma cuts across existing rock layers and solidifies.

Front

How do extrusive igneous rocks form?

Back

Extrusive igneous rocks form from lava that erupted onto Earth's surface and cooled quickly.

Front

What type of cooling leads to fine-grained igneous rocks?

Back

Fine-grained igneous rocks with small crystals are formed from rapidly cooling lava.

Front

What is lava?

Back

Lava is melted material that reaches the Earth's surface and comes into contact with oxygen.

Front

Which factor does NOT affect the formation of magma?

Back

Volcano does NOT affect the formation of magma; the factors that do include composition, pressure, and temperature.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive igneous rocks form from magma that cools slowly beneath the Earth's surface, while extrusive igneous rocks form from lava that cools quickly on the surface.

Front

What is a batholith?

Back

A batholith is a large mass of intrusive igneous rock that has cooled and solidified deep within the Earth's crust.

Front

What is a sill in igneous rock formation?

Back

A sill is a flat, sheet-like body of igneous rock that forms between existing rock layers.

Front

What is the role of temperature in magma formation?

Back

Temperature affects the melting of rocks, which can lead to the formation of magma.