Exploring the Three Main Types of Rocks

The video tutorial explores the three main types of rocks: igneous, metamorphic, and sedimentary. It explains how igneous rocks form from magma or lava, differentiating between intrusive and extrusive types. Metamorphic rocks are discussed in terms of their formation through heat and pressure, with examples of foliated and non-foliated types. The process of sedimentary rock formation is detailed, highlighting weathering, erosion, deposition, compaction, and cementation.

Which type of rock is formed from sediments called clasts?

• Igneous

• Metamorphic

• Sedimentary

• None of the above

What is the origin of igneous rocks?

• From heat and pressure

• From hot molten rock

• From sediments

• From weathering

Which type of igneous rock is formed from lava on the Earth's surface?

• Felsic

• Intrusive

• Extrusive

• Mafic

What is the main difference between intrusive and extrusive igneous rocks?

• Color

• None of the above

• Formation location

• Mineral content

What does the term 'mafic' refer to in igneous rocks?

• Presence of air bubbles

• Light color

• Dark color

• High silica content

What causes metamorphic rocks to form?

• Weathering and erosion

• Deposition and compaction

• Heat and pressure

• Cooling of magma

Which type of metamorphism is caused by extreme pressure?

• Contact metamorphism

• Regional metamorphism

• Thermal metamorphism

• None of the above

What is the original rock called before it becomes a metamorphic rock?

• Protolith

• Parent rock

• Both A and B

• None of the above

What process involves the hardening of loose sediment into rock?

• Lithification

• Deposition

• Erosion

• Weathering

What percentage of the Earth's surface is covered by sedimentary rocks?

• 100%

• 75%

• 25%

• 50%

Tags

NGSS.MS-ESS1-4