Rock cycle and Igneous rocks

What classification of rocks is formed from solidification and crystallization of molten rocks?

• Sedimentary rocks

• Igneous rocks

• Metamorphic rocks

• All of them

Which type of rock covers 75% of the earth's surface?

• Extrusive rocks

• Sedimentary rocks

• Matamorphic rocks

• Igneous rocks

Which type of igneous rocks based on composition has the highest amount of silica content?

• mafic rocks

• felsic rocks

• intermediate rocks

• ultramafic rocks

How does the amount of silica affect the color of igneous rock?

• It doesn't matter what color is.

• It has no effect at all.

• The more the silica it has, the lighter the color

• The lesser the silica ha, the lighter the color is.

What is another name for intrusive igneous rock?

• Lava rock

• Molten rock

• Volcanic rock

• Plutonic rock

Which of the following rocks are formed when lava cools and solidifies on the earth's surface?

• Volcanic rock

• Batholiths

• Mafic rocks

• Felsic rocks

What happens to the molten rocks when they reach the Earth's Surface?

• Their temperature remains the same.

• They cool down and solidify.

• They remain semi-liquid molten rocks.

• They flow continuously.

Which of the following is NOT an extrusive igneous rock?

• rhyolite

• obsidian

• basalt

• granite

What is the size of the crystals if the rock cools slowly and forms below the Earth's surface?

• small

• no crystals

• large

• glassy

What is this rock?

• granite

• basalt

• pumice

• obsidian