What natural forces are primarily responsible for the constant change of the Earth's surface?

• Earthquakes and volcanoes

• Tides and ocean currents

• Wind, water, and ice

• Gravity and magnetism

How do wind and water contribute to the process of erosion?

• By breaking down and moving sediment

• By increasing the Earth's temperature

• By creating new landforms

• By causing earthquakes

What role does the sun play in the weathering of rocks?

• It melts rocks into lava

• It causes rocks to expand and contract

• It freezes rocks

• It dissolves rocks into liquid

How does freezing water contribute to weathering?

• By evaporating rocks

• By heating rocks

• By compressing rocks

• By expanding and widening cracks in rocks

In what way do plants contribute to the weathering of rocks?

• By absorbing rocks

• By growing roots that crack rocks

• By covering rocks with leaves

• By providing shade to rocks

What is the effect of acid on limestone?

• It strengthens the rock

• It dissolves the rock

• It freezes the rock

• It colors the rock

How do humans accelerate the process of erosion?

• By building dams

• By planting more trees

• By polluting the air and cutting down forests

• By creating artificial lakes

What is one method of erosion control mentioned in the video?

• Using gabions to hold soil in place

• Building skyscrapers

• Draining rivers

• Constructing highways

What is a landslide, as described in the video?

• A large wave in the ocean

• A volcanic eruption

• A sudden slide of rocks and soil down a hill

• A type of earthquake

What is the primary cause of acid rain?

• Pollution from cars and factories

• Deforestation

• Natural volcanic activity

• Excessive rainfall