Rocks and the Rock Cycle: Complexities of the Rock Cycle

The video explains the rock cycle, highlighting how sedimentary and igneous rocks can melt into magma, and how sedimentary rocks undergo weathering to form sediment. It also covers how igneous and metamorphic rocks transform under heat and pressure into metamorphic rocks, using granite and gneiss as examples. The rock cycle is depicted as a complex web of ongoing changes.

What can sedimentary and igneous rocks transform into when they melt?

• Sediment

• Magma

• Metamorphic rocks

• Granite

What process gradually wears down sedimentary rocks into sediment?

• Melting

• Erosion

• Weathering

• Crystallization

Which type of rock can be reduced to sediment through weathering?

• Igneous rock

• Metamorphic rock

• Sedimentary rock

• Magma

What happens to igneous rocks when they are subjected to heat and pressure?

• They transform into metamorphic rocks

• They melt into magma

• They remain unchanged

• They become sedimentary rocks

Which metamorphic rock is formed from granite under heat and pressure?

• Basalt

• Limestone

• Gneiss

• Slate