Waves, Tides and Jetties

What is an ocean wave?

• A wave is an back-and-forth movement of wind.

• A wave is an up-and-down movement of the bottom water.

• A wave is an up-and-down movement of the surface water.

• A wave is an back-and-forth movement of the surface water.

What does a wave carries forward?

• Seagrass and fish carcasses it finds on the way.

• Energy.

• Water.

• Surfboards.

How does water move inside the wave?

Number the options to complete the sentence correctly. Cross out the options that do not belong to the sentence.

As waves approach (1), where water is (2) the wave (3)

• goes faster

• shore

• deep

• shallow

• slows down

Explain why waves break.

What causes surface waves?

• The wind.

• Rivers pouring fresh water into sea water.

• The moon's gravity.

• The sun's gravity.

Where can waves grow the biggest?

• In the ocean, where there is nothing to stop the wind.

• In the ocean, where water can be extremely deep.

• In a closed sea, such as the Mediterranean Sea, because there are a lot of ships to disturb the surface of the water.

• In a closed sea, where water is less deep.

Explain how waves can affect the shoreline.

When we refer to the ocean, what is a current?

• It's a wave that is moving right now, compared to a past wave.

• It's a steady flow of water that flows in a regular pattern. It moves large amounts of water, sometimes for long distances.

• It's a steady flow of water that flows in a regular pattern. It moves small amounts of water, sometimes for long distances.

• It's a steady flow of water that flows in a regular pattern. It moves large amounts of water for very short distances.

A current depends on __________. but also on water temperature, _____________, and the shape of both ocean _________ and _________________ .