Rocks And Their Classification

Q. Rocks are classified into which of the following types?

1. Igneous
2. Sedimentary
3. Elementary
4. Metamorphic

Q. When hot and molten magma from the mantle rises up and reaches the crust layer but fails to reach the surface, it cools down and solidifies within the crust. What type of rocks are these?

1. Sedimentary rocks
2. Intrusive igneous rocks
3. Extrusive igneous rocks
4. Metamorphic rocks

Q. What is the thickness of the upper mantle?

1. 520 kms
2. 620 kms
3. 720 kms
4. 820 kms

Q. Which among the following is an example of metamorphic rock?

1. Pumice
2. Basalt
3. Marble
4. Coal

Q. Rocks are composed of .

1. fossils
2. minerals
3. sediments

Q. rocks form when magma rises from the mantle but cools down and solidifies in the crust.

1. Sedimentary
2. Extrusive igneous
3. Intrusive igneous
4. Metamorphic

Q. Choose the correct pairs.

1. Igneous
2. Granite
3. Sedimentary
4. Shale
5. Metamorphic
6. Marble

Q. Which among the following is an example of a sedimentary rock?

1. Granite
2. Marble
3. Sandstone
4. Slate

Q. Ramu found a hard, heavy, homogenous, and fossil-free rock in his village the other day. Which type of rock is it?

1. Metamorphic
2. Mix of metamorphic and sedimentary
3. Sedimentary
4. Igneous

Q. Which among the following types of rock is formed when it undergoes a transformation when subjected to extreme heat and pressure?

1. Intrusive igneous rock
2. Sedimentary rock
3. Metamorphic rock
4. Extrusive igneous rock

Q. Which among the following statement(s) is true about metamorphic rocks?

1. They are formed when rocks change their original shape and form due to intense heat or pressure.
2. Metamorphic rocks are formed by the accumulation of other eroded substances.
3. They are soft and have many layers as they are formed due to the deposition of sediments.
4. Metamorphic rocks are formed when magma (or molten rocks) have cooled down and solidified.

Q. The hot molten material inside the earth which comes to surface of the Earth through volcanic vents is known as .

1. magma
2. lava
3. mantle

Q. You may find the remains of dead animals or plant fossils in these rocks. These rocks are generally brittle and lightweight, and most of them are porous. Select the correct option in this regard.

1. Igneous and sedimentary rocks
2. Sedimentary rocks
3. Metamorphic rocks
4. Igneous rocks