Rock Types and Formation Processes

The video explains the rock cycle, detailing the formation and transformation of igneous, sedimentary, and metamorphic rocks. It describes how igneous rocks form from cooled magma, sedimentary rocks from compacted sediments, and metamorphic rocks from heat and pressure. Each rock type can transform into another through various processes, illustrating the interconnected nature of the rock cycle.

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

• Igneous, Sedimentary, Metamorphic

• Igneous, Volcanic, Metamorphic

• Sedimentary, Volcanic, Igneous

• Metamorphic, Volcanic, Sedimentary

How is igneous rock formed?

• By the cooling of magma

• By the compaction of sediments

• By the melting of sedimentary rock

• By the erosion of metamorphic rock

What can happen to igneous rock after it is formed?

• It can only be melted back into magma

• It can only undergo heat and pressure

• It can only become sedimentary rock

• It can be weathered, melted, or undergo heat and pressure

What process leads to the formation of sedimentary rock?

• Melting of igneous rock

• Cooling of magma

• Compaction and cementation of sediments

• Erosion of metamorphic rock

Which type of rock is most commonly formed from weathered sediments?

• Igneous rock

• Sedimentary rock

• Volcanic rock

• Metamorphic rock

Under what conditions are metamorphic rocks formed?

• By compaction of sediments

• By erosion of igneous rock

• By cooling of magma

• Under extreme heat and pressure

What can happen to metamorphic rock in the rock cycle?

• It can only become igneous rock

• It can be weathered, melted, or remain unchanged

• It can only be weathered into sediment

• It can only be melted into magma

What characteristic is distinct in sedimentary rocks?

• They are always shiny and smooth

• They are formed by cooling magma

• They are formed under high pressure

• They have clearly defined layers

How does the appearance of igneous rocks vary?

• Based on the location where it is found

• Based on the amount of pressure applied

• Based on the minerals in the magma when it cools

• Based on the size of the rock

What should you try to identify when you find a rock?

• Its color

• Its type: igneous, sedimentary, or metamorphic

• Its size

• Its weight