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Ocean Current

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Nikoleta Licheva

on 6 March 2014

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Transcript of Ocean Current

Ocean Currents
Lesson By:
surface currents?
Ocean currents are
streamlike movements

of water in the oceans
What are the types of ocean currents ?
There are
3 types
of ocean currents
What are ocean currents?
1. Surface Currents
2. Deep Currents
3. Convection Currents
Continental Deflections
The Coriolis Effect
Global Winds
Continental Deflections
When a
direction of surface

Coriolis Effect
Global Winds
Global winds
push water
across Earth's surface.

Type: Convection Currents
What do ocean currents transport?


Type: Deep Currents

Further Understanding of Ocean Currents
Surface Currents
surface currents

The sun heats the atmosphere
Fill in the cause-and- effect chart to show how the sun's energy powers surface ocean currents
This is upwelling
Quiz Time!

Multiple Choice
True or False
The Ultimate Question!
1. How do deep ocean currents form?
A. As warm, dense water sinks and flows beneath cold ocean water
B. As cold, dense water sinks and flows beneath warm ocean water.
C. As warm, dense water sinks and flows with other warm ocean water.

2. Surface currents:
A. are wind-driven
B. are the only currents that most people see
C. affect about 20% of the ocean’s volume (total water)
D. all of the above

3. Deep ocean currents are:
A. non-existent
B. wind-driven
C. density-driven
D. Circumpolar

4. Winds and currents are ultimately created by:
A. Equator
B. Sun
C. Moon
D. All of the above

1. The only factors that affect the surface currents are the
global winds and the continental deflections. T or F

2. Ocean currents only transport energy. T or F

3. Surface currents are powered by the sun. T or F

4. Upwelling is part of the formation of surface currents. T or F

5. Wind does not affect ocean currents. T or F

Describe how surface currents would be affected if Earth did not rotate + what the coriolis effect is!
Lab Time!!
Main Question: How do deep currents form (density/salinity)?

Pour water in the Plastic Box until the water has filled the ¾ of the plastic box.

Fill the 2 beakers with 250ml of water (in each).

Add a stable amount of food coloring to both beakers (a different color for each).

By using the third beaker to measure, add 10 ml of salt in one of the beakers and 50 ml of salt to the other one.

Start mixing the salt thoroughly (it will take a while), until all of the salt is dissolved. THIS IS VERY IMPORTANT!

Then pour one of the two beakers , wait a minute, then pour the other carefully in the plastic box.
Reflection Time!
Questions based on observations:

1. Observe the colorful water. What do you see?

3. Why do you think this happened?

3. How is this lab related to deep currents?

4. What did you learn after doing this experiment?

5. Was it helpful or not? Why?

Lauren Rattray
Nikoleta Licheva
Ventsy Yosifov
Minami Fukuda
Despina Chouliara
Full transcript