Tidal Jeopardy!

Tidal Jeopardy!Making Waves

Know Your Tides Tables

Wat-er Disaster!

Current Events

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Final Jeopardy

What is a Wave?

A Wave is a movement of energy through a

body of water.

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What 3 factors influence the size of a wave?

The strength of the wind, the length of time the wind blows, and the distance the

wind blows across.

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Define 4 parts / characteristics of a wave.

1. Crest: highest point2. Trough: lowest point3. Wavelength: distance

between 2 crests / troughs4. Wave Height: distance from

crest to trough5. Frequency: number of waves

during a certain interval of time

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Explain what is happening to the wave at each point.

As the wave nears shore at B, the bottom of the wave slows as it scrapes the

ground. By the time it reaches C, the top crashes over the bottom - topples

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Final Jeopardy

Describe the two types of daily tides.

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High tide is when the water level is at its highest point.

Low tide the lowest point.

What causes tides, and how often does a tidal

cycle occur?

The gravity of the Moon & Sun cause tides. Tides occur every

12 hours and 25 minutes.

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What are Spring & Neap tides? How are the ‘planets’ aligned?

Spring tide is the greatest difference between high & low tide. Neap tide is the

smallest difference.

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Waves do not move water forward. Explain why,

and what happens when waves reach the shore.

Wind energy is transferred through the water. Near the shore, wave

height increases as length decreases, causing wave to break.

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Final Jeopardy

Two natural phenomena we have studied this chapter are...

Tsunamis and El Nino

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What causes a Tsunami and where does it occur?

An earthquake in the ocean floor.

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What is Upwelling and how does El Nino affect it?

Upwelling is when warm water is pushed away by wind and cold

water rises. El Nino brings more warm water, preventing upwelling.

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What is a Tsunami like in the open ocean compared to when it reaches shore? What causes this difference?

In the open ocean, tsunamis have a small wave height, but massive wavelength. On shore, the length rapidly decreases from

friction, causing the height to spike.

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Final Jeopardy

What are the 2 types of currents?

Surface currents and Deep currents.

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What causes a surface current? What is the strongest surface

current in the N. Atlantic Ocean?

Surface currents are driven by wind. The Gulf Stream.

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What kind of currents affect climate and how? What causes

the other kind of current?

Surface currents heat or cool air above them, affecting weather of land nearby. Deep currents are

caused by differences in density.

After spending some time in the ocean, you turn to go dry off… but everything is gone!

What happened?

Waves hitting the beach at an angle causes Longshore Drift.

Your stuff is up current.

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Final Jeopardy

What is Salinity?

The amount of dissolved salt in water.

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What is the average salinity in the ocean?

35 parts per thousand (35ppt).

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What two major effects does salinity have on

the properties of water?

Salinity increases the density of water and decreases the freezing

point (to -1.9⁰C).

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Rank the following locations based on where a ship will float highest in the water to lowest:

Pacific Ocean, at the mouth of a river, Arctic Ocean.

Arctic ocean – frozen water increases amount of salt left behindPacific ocean – has average salinityRiver mouth – supply of fresh water

lowers avg salinity.

Final Jeopardy

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What 4 properties of ocean water change with depth and how do they change as you go deeper?

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As depth increases…1. Temperature decreases2. Salinity increases3. Density increases (salty & cold)4. Pressure increases

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