Igneous Rocks - Geology Quiz

What does the term 'igneous' mean?

• Air-born

• Fire-born

• Earth-born

• Water-born

Which type of igneous rock solidifies within the Earth?

• Pyroclastic

• Volcanic

• Extrusive

• Intrusive

What is the main difference between mafic and silicic rocks?

• Mafic rocks have high silica content

• Silicic rocks have high iron and magnesium content

• Mafic rocks have high iron and magnesium content

• Silicic rocks have low silica content

Which of the following is an example of an extrusive igneous rock?

• Basalt

• Diorite

• Gabbro

• Granite

What is the texture of a rock with large crystals in a fine-grained groundmass called?

• Aphanitic

• Pyroclastic

• Porphyritic

• Vesicular

What type of rock is formed from slow cooling magma under the earth's surface?

• Extrusive Igneous
• Intrusive Igneous
• Metamorphic
• Sediment

Which type of rock is made from lava cooling on the surface of Earth?

• EXTRUSIVE Igneous

• Metamorphic

• Sedimentary

• INTRUSIVE Igneous