Coastal Erosion and Its Effects

According to the passage, what is the main topic discussed in the episode of Practical Engineering?

• Coastal erosion and the ways we fight against it.

• The history of bridge construction.

• Innovations in renewable energy.

• Urban transportation planning.

The coastline is always static and unchanging, as shown on a map.

• True

• False

What is the main force responsible for moving beaches and causing coastal erosion, according to the passage?

• Wind

• Waves

• Rain

• Human activity

Fill in the blank: The material that makes up the land—soil and rock—is in constant flux, largely due to the ________ enacted by seawater over time.

• interminable power

• gentle breeze

• occasional warmth

• fleeting shadow

What is chemical weathering, as described in the passage?

• Chemical weathering is when seawater actually dissolves the rocks themselves.

• Chemical weathering is when rocks are broken by wind.

• Chemical weathering is when rocks are moved by animals.

• Chemical weathering is when rocks are crushed by glaciers.

Why are waves considered destructive, according to the passage?

• Waves are destructive because water is heavy and exerts a lot of force, which can break and move loose sediment and rocks.

• Waves are destructive because they always bring in new sand to the shore.

• Waves are destructive because they only occur during storms.

• Waves are destructive because they make the water colder.

What happens to the rate of coastal erosion during storm events like hurricanes and typhoons?

• The rate of coastal erosion is amplified during storm events like hurricanes and typhoons.

• The rate of coastal erosion remains unchanged during storm events like hurricanes and typhoons.

• The rate of coastal erosion decreases significantly during storm events like hurricanes and typhoons.

• The rate of coastal erosion is completely halted during storm events like hurricanes and typhoons.

What is one of the main causes of accelerated coastal erosion mentioned in the passage?

• Low tides

• High winds leading to high waves

• Planting mangrove forests

• Building apartments near the coast

According to the passage, why is development nearest to the coast at risk?

• It is too expensive

• It is constantly at risk of being claimed by the sea

• It is not popular

• It is protected by mangrove forests

Fill in the blank: Beaches support massive local economies, providing millions of jobs and billions of dollars of ________ activity.

• economic

• recreational

• political

• artistic