Understanding the Rock Cycle

The video explains the rock cycle, detailing how igneous, sedimentary, and metamorphic rocks form and transform. Igneous rocks originate from cooled magma or lava, while sedimentary rocks form from accumulated sediments. Metamorphic rocks result from existing rocks undergoing heat and pressure changes. The cycle is continuous, with rocks changing forms over time.

What are the three main types of rocks involved in the rock cycle?

• Sedimentary, metamorphic, and volcanic

• Igneous, sedimentary, and volcanic

• Igneous, volcanic, and metamorphic

• Igneous, sedimentary, and metamorphic

How does igneous rock form?

• Through the cooling and hardening of magma or lava

• By the accumulation of sediments

• From the transformation of existing rocks under pressure

• By the erosion of existing rocks

What is a characteristic feature of basalt as it cools?

• It forms layers

• It turns into sand

• It becomes porous

• It forms columnar structures

What process involves the breakdown and movement of rocks?

• Crystallization

• Sedimentation

• Metamorphism

• Erosion

Which type of sediment is likely to travel the farthest during erosion?

• Gravel

• Pebbles

• Clay particles

• Sand

How are sedimentary rocks formed?

• Through volcanic eruptions

• Through the cooling of magma

• By the compaction and cementation of sediments

• By the melting of existing rocks

What is a conglomerate rock?

• A sedimentary rock with large rounded fragments

• A type of igneous rock

• A metamorphic rock formed from limestone

• A rock formed from volcanic ash

What causes metamorphic rocks to form?

• Temperature and pressure changes

• Erosion and sedimentation

• Cooling of lava

• Volcanic activity

What can sandstone transform into under heat and pressure?

• Quartzite

• Basalt

• Marble

• Granite

What is the result of partial melting of rocks?

• Formation of magma

• Creation of sedimentary layers

• Development of erosion patterns

• Formation of columnar basalts