Rock types igneous sedimentary metamorphic for a test

What are the three main rock types?

Igneous, sedimentary, and metamorphic.

Definition of igneous rock?

Rocks formed from cooled magma or lava. Examples: granite, basalt.

True or false: Sedimentary rocks form from other rocks.

True, because they are made from particles of other rocks or organic material.

Fill in the blank: ______ rocks change from heat and pressure.

Metamorphic

Difference between igneous and sedimentary rocks?

Igneous rocks form from cooling magma; sedimentary rocks form from layers of sediment.

What is magma?

Molten rock below the Earth's surface. When it erupts, it becomes lava.

Example of metamorphic rock?

Marble, which comes from limestone.

True or false: All metamorphic rocks are formed from igneous rocks.

False, because they can form from sedimentary or other metamorphic rocks too.

What creates sedimentary rocks?

Layers of sediment compacted and cemented together.

Examples of sedimentary rocks?

Sandstone, limestone, and shale.

Which rock type is most likely to contain fossils?

Sedimentary rocks often contain fossils because they form in layers.

How do igneous rocks form?

From the cooling and solidification of magma or lava.

Fill in the blank: ______ rocks can be formed by extreme changes.

Metamorphic

Comparison: Intrusive vs. extrusive igneous rocks?

Intrusive rocks cool slowly underground; extrusive rocks cool quickly on the surface.

What is sediment?

Small pieces of rock, minerals, or organic materials that accumulate over time.

True or false: Metamorphic rocks are always hard.

False, because some can be softer depending on their composition.

What processes lead to sedimentary rock formation?

Weathering, erosion, deposition, compaction, and cementation.

Example of an igneous rock?

Basalt is a common igneous rock found in volcanic regions.