Lesson 2-4 Types of rocks

Front

What are the three main types of rocks?

Back

Igneous, Sedimentary, Metamorphic.

Front

How are igneous rocks formed?

Back

Igneous rocks are formed from the cooling and solidification of molten rock (magma or lava).

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 sedimentary rock?

Back

Sedimentary rock is formed from the accumulation and compaction of mineral and organic particles.

Front

What are the two main types of sedimentary rocks?

Back

Clastic and chemical sedimentary rocks.

Front

What is metamorphic rock?

Back

Metamorphic rock is formed from existing rocks that are changed by heat, pressure, or chemically active fluids.

Front

What does 'foliated' mean in terms of metamorphic rocks?

Back

Foliated metamorphic rocks have a layered or banded appearance due to the alignment of mineral grains.

Front

What does 'nonfoliated' mean in terms of metamorphic rocks?

Back

Nonfoliated metamorphic rocks do not have a layered or banded appearance; mineral grains are arranged randomly.

Front

What is weathering?

Back

Weathering is the process of breaking down rocks through physical, chemical, or biological means.

Front

What is erosion?

Back

Erosion is the process of moving weathered rock and soil from one location to another.