Coastal Processes and Wave Types Quiz

What determines the size and energy of a wave?

• The fetch, strength of the wind, and duration of the wind

• The temperature of the sea

• The time of day

• The color of the water

Answer explanation

The size and energy of a wave are primarily determined by the fetch (distance over water that the wind blows), the strength of the wind, and the duration of the wind. These factors directly influence wave formation.

What is the swash?

• The distance between waves

• The height of the wave

• The water flowing towards a beach when a wave breaks

• The movement of water down the beach

Answer explanation

The swash refers to the water that flows towards the beach when a wave breaks. It is the movement of water that occurs after a wave crashes, distinguishing it from other wave characteristics like height or distance.

Which type of wave is characterized by a strong backwash?

• Constructive wave

• Destructive wave

• Tidal wave

• Seismic wave

Answer explanation

Destructive waves are characterized by a strong backwash, which erodes the shoreline. In contrast, constructive waves have a stronger swash and less backwash, making destructive waves the correct choice for this question.

What is a characteristic of constructive waves?

• They have a strong backwash

• They are steep and close together

• They have a strong swash and weak backwash

• They remove sediment from the beach

Answer explanation

Constructive waves are characterized by a strong swash that pushes sediment onto the beach and a weak backwash that does not remove much sediment. This is why the correct choice is that they have a strong swash and weak backwash.

What happens when there is energy loss in coastal processes?

• Waves become taller

• Waves become stronger

• Material is deposited

• Material is eroded

Answer explanation

When energy is lost in coastal processes, waves lose their strength, leading to the deposition of material rather than erosion. This results in the accumulation of sediments along the shore.

What is the backwash?

• The height of the wave

• The movement of water down the beach

• The water flowing towards a beach when a wave breaks

• The distance between waves

Answer explanation

Backwash refers to the movement of water down the beach after a wave has broken. It is the process where water recedes back into the ocean, distinguishing it from the incoming wave.

What is the effect of a strong swash in constructive waves?

• It removes sediment from the beach

• It builds up the beach by bringing sediments

• It causes erosion

• It creates steep waves

Answer explanation

A strong swash in constructive waves transports and deposits sediments onto the beach, leading to beach buildup. This is why the correct answer is that it builds up the beach by bringing sediments.

Which type of wave tends to have a low frequency?

• Seismic wave

• Tidal wave

• Constructive wave

• Destructive wave

Answer explanation

Constructive waves typically have a low frequency, characterized by their long wavelengths and gentle energy, making them distinct from seismic and tidal waves, which generally have higher frequencies.

What is the fetch?

• The distance a wave has traveled

• The height of a wave

• The speed of the wind

• The time between waves

Answer explanation

Fetch refers to the distance a wave has traveled across the ocean. It is not about the height, speed of the wind, or time between waves, making 'the distance a wave has traveled' the correct choice.

What is the main difference between constructive and destructive waves?

• Destructive waves are further apart

• Destructive waves have a stronger swash

• Constructive waves are taller

• Constructive waves build up beaches, while destructive waves remove material

Answer explanation

The main difference is that constructive waves build up beaches by depositing sand, while destructive waves erode and remove material from the shore. This highlights the contrasting effects of each wave type on coastal landscapes.