Types of Rocks and Their Properties

The video explains the rock cycle, starting with volcanic eruptions that form igneous rocks. It covers how weathering and erosion break down rocks into sediments, which compress into sedimentary rocks. Metamorphic rocks form under high pressure and temperature. Finally, rocks melt back into magma, completing the cycle.

What determines the size of crystals in igneous rocks?

• The altitude of the eruption

• The type of volcano

• The speed at which the lava cools

• The color of the lava

Which process is responsible for the initial formation of igneous rocks?

• Sedimentation

• Volcanic eruption

• Erosion

• Metamorphism

Which type of rock is formed from layers of sediment compressed over time?

• Igneous rock

• Metamorphic rock

• Sedimentary rock

• Volcanic rock

What is a common characteristic of sedimentary rocks?

• They have large crystals

• They are resistant to weathering

• They contain fossils

• They are formed from cooled lava

Which rock type is known for being easily shaped and carved?

• Slate

• Granite

• Basalt

• Sandstone

What causes the transformation of rocks into metamorphic rocks?

• Erosion by wind

• Cooling of magma

• High pressure and temperature

• Exposure to sunlight

Which of the following is an example of a metamorphic rock?

• Granite

• Sandstone

• Slate

• Limestone

What is a key property of slate that makes it useful for roofing tiles?

• It is colorful

• It is porous

• It is easily split into thin layers

• It is lightweight

What happens to rocks as they are pushed deeper into the Earth?

• They rise to the surface

• They melt to form magma

• They become sedimentary rocks

• They become lighter

What completes the rock cycle?

• The erosion of rocks

• The melting of rocks into magma

• The formation of igneous rocks

• The cooling of lava