Metamorphic Rocks

Which are the two agents that are necessary in the formation of metamorphic rocks?

• erosion and heat

• heat and lava

• lava and pressure

• pressure and heat

In the formation of metamorphic rocks, what effect do temperature and pressure primarily have?

• they erode rocks

• they create layers

• they make rocks smaller

• they change existing minerals

During the formation of metamorphic rocks, what most likely causes pressure to increase?

• magma pockets rise

• gravity pulls on rocks

• rocks melt deep beneath Earth's surface

• Rocks beneath Earth's surface are forced toward the mantle

During the formation of metamorphic rocks, what is one event that leads to increased heat?

• sun warms rocks

• magma pockets rise

• friction occurs between sliding rocks

• lava at Earth's surface flows over rocks

Which phrase describes a metamorphic rock?

• formed from a volcano

• was once buried underground

• formed from evaporating water

• contains minerals that have not changed

Which statement describes the formation of metamorphic rocks?

• rocks beneath the surface melt

• rocks above the surface are eroded

• rocks beneath the surface are forced toward the mantle

• rock layers near the surface decrease pressure on layers beneath them

Which phrase describes foliated rocks?

• tend to break in half

• grains arranged randomly

• tend to split apart along bands

• grains arranged in increasing size

Which describes gneiss?

• igneous

• formed from shells

• tends to split along bands

• grains randomly arranged

Which describes slate?

• non-foliated

• igneous

• does not split into layers

• grains arranged in parallel layers

Which describes a characteristic of quartzite?

• igneous

• foliated

• does not split into layers

• grains arranged in parallel layers