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WorksheetsOcean Currents and Tides
Total questions: 15
Worksheet time: 11mins
What is the movement of water in one direction called?
Current
Tide
Circulation
Conveyor belt
Which type of current is caused by wind blowing onto the ocean surface?
Thermohaline circulation
Waves
Wind-driven currents
Tides
How deep can wind-driven currents reach?
100 meters
200 meters
500 meters
5000 meters
What are the two main types of permanent circulating currents?
Wind-driven currents and tides
Thermohaline circulation and waves
Waves and gyres
Wind-driven currents and thermohaline circulation
What causes thermohaline circulation?
Differences in water temperature and salinity
Gravitational pull of the Moon
Wind blowing onto the ocean surface
Alternating rising and falling of the sea
Why is thermohaline circulation known as the 'great ocean conveyor belt'?
It moves water all around the world
It creates high and low tides
It circulates water in large circular patterns
It balances the temperature of the Earth
How long does it take for water to make one complete circuit of the planet through thermohaline circulation?
10 years
100 years
1000 years
10,000 years
What is the alternate rising and falling of the sea called?
Current
Circulation
Tide
Conveyor belt
What causes tides?
Wind blowing onto the ocean surface
Differences in water temperature and salinity
Gravitational pull of the Moon
Alternating rising and falling of the sea
How many high tides and low tides occur in 24 hrs?
1 high tide, 1 low tide
2 high tides, 2 low tides
3 high tides, 3 low tides
4 high tides, 4 low tides
When does the Moon's gravitational pull create a high tide?
When ocean waters face the Moon
When ocean waters are opposite the Moon
When ocean waters are not directly facing or opposite to the Moon
When ocean waters are at their deepest point
What does the word 'tide' refer to?
Circulation of water in the ocean
Rising and falling of the sea
Gravitational pull of the Moon
Movement of water caused by wind
Which type of current circulates water all around the world?
Wind-driven currents
Thermohaline circulation
Tides
Gyres
How are wind-driven currents different from thermohaline circulation?
They move in large circular patterns called gyres
They are caused by differences in water temperature and salinity
They are temporary and small
They circulate water from the surface to the ocean depths
What is the role of thermohaline circulation in balancing the temperature of the Earth?
It moves cold water to warmer places and warm water to cooler places
It creates high and low tides
It circulates water in large circular patterns
It moves water all around the world
