Earth Science Quiz 6.2: Igneous Rock

Three factors that affect whether rock melts include temperature, pressure, and...

• the presence of fluids in the rock.

• the presence of animals in the rock.

• the presence of wind in the air.

• if the rock has ever melted before.

Rock melts when...

• its temperature drops below the melting point of minerals in the rock.

• its temperature rises above the melting point of minerals in the rock.

• the air temperature reaches 38°C.

• it breaks into fragments.

Tags

NGSS.MS-PS1-4

As temperature drops, the first minerals to crystallize from magma have

• the lowest freezing point.

• the highest freezing point.

• no freezing point.

• the same freezing points.

Crystals that form during fractional crystallization

• settle in the middle of the magma chamber.

• settle at the bottom or stick to the walls and ceiling of the magma chamber.

• leave the magma chamber.

• dissolve in the magma chamber.

Large mineral crystals are commonly found in ________________________.

What two components are responsible for the dark color of mafic rock?

Name two rocks from the intermediate family.

Choose the definition/description that best matches the term "volcano".

• a series of lava flows that cover a vast area with thick rock

• an extrusion that takes the form of a flat mass of rock

• a vent through which magma, gases, or volcanic ash is expelled

• an igneous rock mass that forms on Earth’s surface

• volcanic ash deposits that form during an eruption

Choose the definition/description that best matches the term "lava flow."

• an extrusion that takes the form of a flat mass of rock

• the solidified central vent that remains after the soft parts of a volcano are eroded by wind and water

• volcanic ash deposits that form during an eruption

• a series of lava flows that cover a vast area with thick rock

Choose the definition/description that best matches the term "tuff."

• the solidified central vent that remains after the soft parts of a volcano are eroded by wind and water

• an extrusion that takes the form of a flat mass of rock

• volcanic ash deposits that form during an eruption

• a series of lava flows that cover a vast area with thick rock