1. We will know about the effects of the ocean currents
By:
Sam Whaley

2. What are ocean currents?
The ocean current is the steady flow of ocean water in a prevailing direction.
Ocean currents are caused by the sun, wind and the rotation of the Earth.
Surface currents are the currents that are caused above a depth of 400 meters (1,300 feet) and are mostly caused by wind.
Deep water currents are currents that are below 400 meters and make up 90% of the ocean.

3. Climate
The ocean holds most of the Earths heat energy. In fact according to the American Institute of Physics oceans store more heat in there top few yards than the entire atmosphere.
When currents move they carry the heat with them which impacts climate. An example of this is El Nino.
El Nino occurs every 4 to 8 years and is the change of the currents in the Pacific Ocean, and brings warmer water to the coast of South America.

4. K.S. What are ocean currents?

5. WWK: We will know how water was brought to the still forming earth
How oceans were made
WWK: We will know how water was brought to the still forming earth
billions of years ago WW

6. Vocab
Comet- a celestial body that consists primarily of ice and dust and of ten develops one or more long tails when near the sun
Asteroid- any of the thousand of small bodies of from 480 miles to less then one mile in diameter that revolve about the sun in orbits lying mostly between those of Mars and Jupiter

7. Theory
The theory, that has the most evidence to back it, is that our planets surface water came from comets that slammed into earth once the planet had cooled. Paul Hartoghs new study to examine the D/H ratio of the comet 103P/Hartley 2, shows that Hartely 2’s water is very similar to that of Earth.

8. Video

9. K.S
What helped bring water to earth billions of years ago?

10. Oceanic Trenches
By: Andy Hawe

11. What Are They?
An oceanic trench is a structure that occurs underwater along the boundaries of a tectonic plate.
They are the deepest places on Earth, Marianas Trench, the deepest point, is 36,201 feet beneath sea level.

12. How They Are Formed
Oceanic Trenches are formed when the oceanic plate dives below the overriding plate.

13. Where Are They?
Oceanic Trenches are usually found near areas with high volcanic activity because volcanoes are common in subduction zones.

14. K.S.
What is the deepest trench in the world?