Biological Weathering

Q. Which of these animals burrow into rocks and causes disintegration of rocks?

1. Rabbit
2. Deer
3. Tiger
4. Lion

Q. How does moss, algae and lichen cause the disintegration of rocks?

1. They grow on rocks and slowly weaken them before they eventually disintegrate.
2. It leads to oxidation and rusting of rocks.
3. It leads to the peeling away of external rock surface due to pressure and temperature changes.
4. It leads to hydration weathering of rocks.

Q. How does biological weathering occur?

1. Erosion caused by wind on rock surface.
2. Erosion caused by water on rock surface.
3. Crystallisation formation on rocks filled with alkaline water.
4. Enlargement of cracks within rocks by roots of plants and living animals.

Q. The roots of plants penetrate through rocks and break it down to form soil.

1. True
2. False

Q. Which of the following factors are responsible for biological weathering of rocks?

1. Plants and Trees
2. Insects and Animals
3. Oxidation
4. Frost Action

Q. How do plants and trees affect the weathering of rocks?

1. Plants grow around rocks where roots penetrate and crack the rocks.
2. Plants grow around rocks and disintegrate the rock into soil.
3. Water from plants is absorbed by minerals in rock and they are weathered due to expansion and contraction.
4. Plant roots cause temperature fluctuations within the rocks to cause weathering.

Q. Imagine that you are moving to stay in a new place. One day you notice that the rocks in the nearby playground are weathered away by moss, lichen and algae.

From the above observation, the new place you are staying belongs to which of the following region?

1. Temperate region
2. Desert region
3. Humid region
4. Arid region

Q. How does biological weathering occur?

1. Reaction of minerals and moisture of rocks
2. Stress caused due to crystallisation of salts on rock surface
3. Erosion of rock surface by wind and water
4. Widening of cracks by roots of plants and burrowing by animals

Q. The roots of plants penetrate through rocks and break it down to form soil.

1. True
2. False

Q. Which of the following options is not likely to be found in humid regions?

1. Cacti
2. Algae
3. Lichen
4. Moss

Q. You probably stay in _______ if you find that nearby rocks in your playground are weathered by moss, lichen, and algae.

1. temperate region
2. cold region
3. humid region
4. arid region

Q. Consider the following statements.

A - Rocks get disintegrated only by physical and chemical factors and not by biological processes.

B - As sprouts turn into bigger plants, they grow bigger and their roots start penetrating into the strong spots of a rock.

Identify the correct statements.

1. A only
2. B only
3. Both A & B
4. Neither A nor B

Q. Select the agents that are involved in biological weathering of rocks.

1. Seawater
2. Plants
3. Insects
4. Rainwater
5. Wind
6. Algae
7. Ants
8. Lichen

Q. Biological weathering takes place due to the growth of plant roots and human activities.

1. True
2. False

Q. How does biological weathering occur?

1. Reaction of minerals and moisture of rocks
2. Stress caused due to crystallisation of salts on rock surface
3. Erosion of rock surface by wind and water
4. Widening of cracks by roots of plants and burrowing by animals

Q. Biological weathering takes place due to the growth of plant roots and human activities.

1. True
2. False

Q. How does biological weathering occur?

1. Reaction of minerals and moisture of rocks
2. Stress caused due to crystallisation of salts on rock surface
3. Erosion of rock surface by wind and water
4. Widening of cracks by roots of plants and burrowing by animals

Q. Which part of rocks is more likely to be affected by biological weathering by plant roots?

1. Joints of rocks
2. Surface of rocks
3. Core of rocks
4. Tip of rocks

Q. Select the agents that are involved in biological weathering of rocks.

1. Seawater
2. Plants
3. Insects
4. Rainwater
5. Wind
6. Algae
7. Ants
8. Lichen

Q. Hello! Let's introduce ourselves. My friend and I live in humid regions. If you want to pay us a visit you can find us on rocks. What do we do? We work on rocks and we live to make them weaker and eventually disintegrate them.

Find us from the below options.

1. Algae
2. Ant
3. Mice
4. Moss