Rock Cycles

The video explains the rock cycle, starting with Earth's oldest rocks, which contain minerals over 4 billion years old. It describes how weathering breaks down rocks into grains, forming sedimentary rocks under pressure. Metamorphic rocks form under heat and pressure, while igneous rocks form from cooled magma. The cycle involves tectonic plate movements, creating mountains and restarting the process.

What is the primary process that breaks down existing rocks on Earth?

• Uplift

• Sedimentation

• Weathering

• Erosion

How are sedimentary rocks formed?

• By melting of existing rocks

• By compression of mineral grains

• Through volcanic eruptions

• By cooling of magma

What transformation occurs when limestone is subjected to heat and pressure?

• It becomes granite

• It turns into marble

• It changes to basalt

• It forms sandstone

What is the process called when magma pushes rocks to the surface?

• Sedimentation

• Weathering

• Uplift

• Erosion

What geological feature is created when tectonic plates collide?

• Valleys

• Mountains

• Rivers

• Canyons