Biological Weathering and Its Effects

The video explains biological weathering, a process where rocks are broken down by living organisms. It covers how plants, animals, and microorganisms contribute to this process. Plant roots grow in rock cracks, animals burrow and disturb rocks, and microorganisms produce chemicals that dissolve rocks. Human activities like construction and mining also play a role. The video highlights the impact of seabirds on coastal cliffs, emphasizing the diverse agents of biological weathering.

What is the primary difference between biological weathering and other types of weathering?

• Biological weathering involves the movement of rocks.

• Biological weathering is a type of chemical weathering.

• Biological weathering is caused by living organisms.

• Biological weathering occurs only in deserts.

What is the role of humic acids in biological weathering?

• They physically break rocks apart.

• They protect rocks from weathering.

• They have no role in weathering.

• They dissolve rocks through chemical reactions.

How do burrowing animals like badgers contribute to biological weathering?

• By secreting acids that dissolve rocks.

• By walking over rocks and causing friction.

• By eating the rocks.

• By breaking up rocks underground.

Which of the following animals is known to directly burrow into rocks?

• Rabbits

• Pedic shells

• Earthworms

• Foxes

Which of the following is a way that plant roots contribute to biological weathering?

• By providing shade to the rocks.

• By growing through cracks and breaking the rocks apart.

• By secreting oils that protect the rocks.

• By absorbing all the moisture from the rocks.

Which of the following is NOT a way that plants contribute to biological weathering?

• By increasing the exposed surface area of rocks.

• By growing roots through rock cracks.

• By secreting acids that dissolve rocks.

• By providing shade to rocks.

In what way do humans contribute to biological weathering?

• By constructing buildings that shield rocks.

• By planting trees that protect rocks.

• By mining and breaking up large sections of rock.

• By walking gently over rock surfaces.

What is a common effect of foot traffic on rock surfaces?

• It has no effect on the rocks.

• It causes significant wear and tear over time.

• It strengthens the rock surfaces.

• It polishes the rock surfaces.

How do bacteria and fungi contribute to the weathering of rocks?

• By consuming the minerals in the rocks.

• By covering rocks and protecting them from weathering.

• By physically moving rocks from one place to another.

• By producing chemicals that break down rocks.

What role do seabirds play in biological weathering?

• They protect rocks from erosion.

• They contribute to weathering by nesting on cliffs.

• They eat the rocks to obtain minerals.

• They clean the rocks with their beaks.