Rocks and Their Classification

Q.

What are the differences between sedimentary rocks and metamorphic rocks?

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

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

Q. Choose the correct pair.

1. 
2. Coal
3. 
4. Limestone
5. 
6. Sandstone

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. 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. What is the thickness of the upper mantle?

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

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

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

Q. Identify the types of rocks found in the Upper Mantle layer.

1. Peridotite
2. Olivine
3. Pyroxene
4. Andesite
5. Magnesium
6. Garnet
7. Spinel
8. Aluminium

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