6.4 lesson 3 Rock Cycle

A geologist is most likely to find igneous rocks ___.

• at the base of a volcano
• at the bottom of a lake
• inside a cave
• at the mouth of a river

A geologist claims that a metamorphic rock was once an igneous rock. How could the igneous rock have turned into a metamorphic rock?

• The igneous rock could have melted and then turned solid again
• The igneous rock could have been uplifted and then weathered to form soil.
• The igneous rock could have been broken apart and its pieces transported to the ocean.
• The igneous rock could have been heated and squeezed for millions of years until new mineral grains and new textures formed in the rock.

Fossils are found only in _____ rock.

• sedimentary
• metamorphic
• igneous
• intrusive

A geologist found a rock whose minerals have been aligned or arranged into parallel bands by high pressure. The geologist probably found _____.

• a sedimentary rock
• a metamorphic rock
• an igneous rock
• a meteorite

When rocks are broken down into small pieces, like sand and gravel, the pieces are known as_____.

• magma
• sediment
• sedimentary rocks
• compaction

Suppose some igneous rocks are forced back down into the Earth as other layers pile on top and the layers then melt. When they eventually cool and harden again, what kind of rocks will they be?

• metamorphic
• igneous
• sedimentary
• all of these

Which of the following help create both metamorphic and sedimentary rocks?

• cementation
• pressure
• heat
• evaporation

Which are sources of heat that help metamorphic rock to form?

• being near pockets of magma rising through the crust
• friction of plate movement
• the heat from the mantle
• all of these

A collision between two continental plates could force one plate down toward the heat of the mantle (but not enough to melt it), producing _____.

• igneous rock
• sedimentary rock
• metamorphic rock
• all rock groups

The rock cycle indicates that each type of rock can _____.

• provide materials to make other rocks
• be changed by forces at Earth's surface
• form other rocks
• all of these