The process by which rocks are broken down into smaller pieces is called_________.

The planet earth is at ________ position from the sun.

1. First
2. Second
3. Third
4. Fourth

________ contains highest mountains and deep oceans.

1. Inner core
2. Outer core
3. Crust
4. Mantle

Carbonic acid, which causes chemical weathering is formed by___________.

1. Carbon dioxide dissolved in rainwater

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2. Rocks dissolved in hydrochloric acid
3. Water and nitric acid reaction
4. None of these

_________layer solid and comprises of tectonic plates.

1. Crust
2. Mantle
3. Inner core
4. Outer core

_________ is an example of chemical weathering.

1. Breaking of rocks by water
2. Breaking of rocks by ice
3. Breaking of rocks by rusting
4. Breaking of rocks by plants

Mantle is divided into _________.

1. Upper and lower mantle
2. Upper and middle mantle
3. Thick and thin mantle
4. Left and right mantle

Splitting of rock along a fracture is an example of _______.

1. Chemical weathering
2. Physical weathering
3. Physiochemical weathering
4. Rock formation

Mantle expands up to a depth of _________below the crust.

1. 5000 km
2. 2900 km
3. 1000 km
4. 7000 km

______ region of the earth is in a molten state.

1. A
2. B
3. C
4. D

The rate of weathering is increased by__________.

1. High humidity
2. High temperature
3. Increased organic activity
4. All of these

Earth is made up of __________ layers.

1. 4
2. 5
3. 6
4. 7

______expands on freezing.

1. Water
2. Plants
3. Animals
4. None of these

Identify the image of the earth.