Pearson 8.2 Review Questions

______ is molten rock that does not reach the Earth’s surface

___________ igneous rocks: igneous rocks that form below the surface of the Earth

__________ is molten rock that erupts from a volcano

__________ igneous rocks: igneous rock that cools and solidifies above the Earth's surface

What do the following rocks have in common: basalt, pumice, scoria, obsidian

• They're all extrusive igneous rocks

• They're all intrusive igneous rocks

What do the following rocks have in common: Granite and dolerite

• They're all extrusive igneous rocks

• They're all intrusive igneous rocks

What are the 3 minerals in granite?

• Halite

• Quartz

• Gypsum

• Feldspar

• Biotite

What features are used to classify igneous rocks?

• Colour

• Shape

• Smell

• Texture

• Weight

Extrusive igneous rocks are formed above ground, but can sometimes found underground because...

• Rocks formed deep underground can be moved to the surface due to Earth's movements. Sedimentation can bury rocks that formed at the surface.

• Rocks formed at the surface can sink below the surface due to Earth's movements. Weathering also exposes rocks that were once buried deeply.

• Rocks formed at the surface can sink below the surface due to Earth's movements. Sedimentation can bury rocks that formed at the surface.

• Rocks formed deep underground can be moved to the surface due to Earth's movements. Weathering also exposes rocks that were once buried deeply.

Intrusive igneous rocks are formed underground, but can sometimes found above ground because...

• Rocks formed deep underground can be moved to the surface due to Earth's movements. Sedimentation can bury rocks that formed at the surface.

• Rocks formed at the surface can sink below the surface due to Earth's movements. Weathering also exposes rocks that were once buried deeply.

• Rocks formed at the surface can sink below the surface due to Earth's movements. Sedimentation can bury rocks that formed at the surface.

• Rocks formed deep underground can be moved to the surface due to Earth's movements. Weathering also exposes rocks that were once buried deeply.