Understanding Constructive and Destructive Waves

The video explains the differences between constructive and destructive waves. Constructive waves are low, flat, and have a strong swash that builds up beaches, while destructive waves are high, steep, and have a strong backwash that erodes beaches. Constructive waves are formed by distant storms and break less frequently, whereas destructive waves are formed by nearby storms and break more frequently. The video concludes by summarizing these differences.

What is the main difference between constructive and destructive waves?

• Destructive waves occur less frequently than constructive waves.

• Constructive waves build up beaches, while destructive waves erode them.

• Constructive waves are higher than destructive waves.

• Destructive waves have a stronger swash than constructive waves.

Which characteristic is true for constructive waves?

• They have a long wavelength.

• They are formed by nearby storms.

• Their backwash is stronger than their swash.

• They have a high frequency.

How do constructive waves affect the beach?

• They remove sand from the beach.

• They create narrow beaches.

• They deposit material, making the beach larger.

• They make the beach steeper.

Where are constructive waves usually found?

• In deep ocean waters.

• On gently sloping beaches.

• Near rocky cliffs.

• On steeply sloping beaches.

What is a key feature of destructive waves?

• They are formed by distant storms.

• They are high and steeply plunging.

• Their swash is stronger than their backwash.

• They have a low frequency.

How often do destructive waves break per minute?

• 6 to 8 times

• 8 to 10 times

• 10 to 14 times

• 14 to 16 times

What happens to the beach when destructive waves hit?

• The beach remains unchanged.

• The beach becomes flatter.

• The beach becomes steeper.

• The beach becomes wider.

What is the main energy movement in destructive waves?

• Forward energy in the swash.

• Backward energy in the backwash.

• Upward energy towards the sky.

• Lateral energy along the shore.

Which type of wave is more likely to be formed by storms close to the coast?

• Neither type

• Both types equally

• Destructive waves

• Constructive waves

What is the overall impact of constructive waves on the beach?

• They flatten the beach.

• They have no impact on the beach.

• They build up the beach.

• They erode the beach.