Igneous Rocks Questions

Rocks are materials made of crystalline solids of mineral grains formed from atoms that are chemically bonded into an orderly structure.

Rocks are classified as metamorphic rocks, igneous rocks, and sedimentary rocks.

Rocks formed when the cooling of molten rock to a solid-state takes place are known as igneous rocks.

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Important Igneous Rocks Questions with Answers

1. What are the types of igneous rocks?

Igneous rocks are classified as intrusive igneous rock and extrusive igneous rock.

2. What are the types of metamorphic rocks?

Types of metamorphic rocks are:

Foliated Metamorphic Rocks

Non-Foliated Metamorphic Rocks

3. The molten rock flowing out of fissures or vents at volcanic centres is known as _____

1. Fis materials
2. Vent materials
3. Lava
4. None of the options

Answer: c) Lava

Explanation: Lava comes out of the volcanic center. They are the molten rock flowing out of fissures or vents.

4. Choose the right answer: Granite is a type of ______

1. Extrusive igneous rock
2. Intrusive igneous rock

Answer: b) Intrusive igneous rock

Explanation: Granite is formed below the earth’s surface resulting in large crystals when cooling takes place. Hence it is classified as intrusive igneous rock.

5. Cooling and solidification of magma or lava lead to the formation of ______ rock.

1. Metamorphic
2. Igneous
3. Sedimentary
4. None of the options

Answer: b) Igneous

Explanation: Igneous rocks are formed due to the cooling and solidification of magma or lava.

6. Choose the correct answer: Which among the following is an extrusive igneous rock?

1. Granite
2. Diorite
3. Tuff
4. Pegmatite

Answer: c) Tuff

Explanation: Among the following, tuff is the extrusive igneous rock.

7. Which rocks erupt onto the surface forming small crystals as part of fast cooling?

1. Extrusive igneous rock
2. Intrusive igneous rock

Answer: a) Extrusive igneous rock

Explanation: Extrusive igneous rocks erupt onto the surface resulting in small crystals as the cooling takes place quickly.

8. Which among the following is dark coloured?

1. Rhyolite
2. Diorite
3. Tuff
4. Obsidian

Answer: d) Obsidian

Explanation: Obsidian is a dark coloured igneous rock with a glass-like texture.

9. Which among the following has a pastel-like structure.

1. Rhyolite
2. Diorite
3. Tuff
4. Obsidian

Answer: a) Rhyolite

Explanation: Rhyolite is a light coloured pastel texture igneous rock.

10. Choose YES or NO: Is mica a type of igneous rock?

1. YES
2. NO

Answer: a) YES

Explanation: Mica, quartz, diorite, granite, and basalt are the type of igneous rocks.

Watch The Below Video to Know about Igneous Rocks and Its Types

Practice Questions

1. What is a rock?
2. What is a sedimentary rock?
3. Define metamorphic rock.
4. Give three examples of intrusive igneous rocks.
5. How is an extrusive igneous rock formed?