Rock Cycle : Igneous Rocks

Where do igneous rocks can be found?

• Beneath and surface of the earth

• Beneath the Earth

• Surface of the Earth

It is molten rock beneath the Earth.

• Rocks

• Magma

• Lava

How do intrusive rocks were formed?

• Formed from magma

• Formed from lava

• Formed from earthquake

How do extrusive rocks were formed?

• Through solidification

• Formed from magma

• Formed from lava

Which of the following is the example of intrusive rocks?

• Basalt

• Obsidian

• Gabbro

If there is _________ of silica in the magma, its minerals will precipitate.

• Undersaturation

• Oversaturation

• Eruption

How much silica content does ultramafic igneous rock has?

• less than 45%

• 45%

• more than 45%

It has very high silica content; more than 65% of SiO2, its magma has high viscosity; more viscous than the intermediate magma.

• Mafic

• Ultramafic

• Felsic

They have a high silica content; 53-65% of SiO2.

• Mafic

• Intermediate

• Felsic

It has a low silica content; 45-52% of SiO2, and composed of pyroxene, calcium-rich plagioclase feldspar.

• Mafic

• Ultramafic

• Intermediate