Rock and Rock Cycle Review

Students want to identify a rock in a nearby field. Which of the following would be most useful in identifying the unknown rock?

• Color

• Smell

• Mineral content

• Specific Weight

Extrusive rocks are formed by __________________.

• lava cooling on Earth's surface.

• pressure inside the Earth

• magma cooling below Earth's surface

• tidal deposits of sediment

Ricardo has an igneous rock in his rock collection. Where did this rock most likely form?

• In a volcano

• on a forest floor

• on a coral reef

• at the bottom of a river

Rocks are affected by heat and pressure. One source of this pressure is ___________________.

• energy form the Sun

• burning of fossil fuels

• the mass of overlying rocks

• the decomposition of organic materials

Rocks found on Earth are generally classified as sedimentary, metamorphic, or igneous. On which basis are these classifications made?

• Where the rocks are found

• How the rocks were formed

• The color and shape of the rocks

• The chemical composition of the rocks

Igneous rocks are classified by where they are formed. Which type of igneous rock forms underground?

• Extrusive

• Intrusive

• Volcanic

• Ash

When limestone is exposed to enough heat and pressure, it goes through physical changes. These changes can turn limestone into a different kind of rock called marble. Which of these BEST describes marble?

• It is an igneous rock

• It is a synthetic rock

• it is a sedimentary rock

• It is a metamorphic rock

Which would NOT be listed as a necessary process for sedimentary rock formation?

• Melting

• compaction

• pressure

• time

What type of rock is sandstone?

• Igneous

• Metamorphic

• Ferromagnetic

• Sedimentary

During the deposition phase of the formation of a sedimentary rock, the eroded material is

• dropped to the surface after being carried from one place to another

• transported from one place on Earth's surface to another

• pressed together and begins to harden to become solid again

• pressed and glued together over a long period of time