Currents Where are the Oceans? Identify the Oceans Tides Waves The Ocean Floor Ocean Storms

Where are the Oceans?

PREDICT: What percent of the earth is covered in water PREDICT: What percent of the earth is covered in water? What percent is land? Explain your prediction.

PREDICT:What percent of the earth’s water is salt PREDICT:What percent of the earth’s water is salt? What percent is fresh? Explain your prediction.

Identify the Oceans of the World

World Ocean Facts Area (1,000,000 km²) Volume (1,000,000 km³) Average Depth (m) Maximum Depth (m) Atlantic Ocean 82.4 323.6 3926 9200 Pacific Ocean 165.2 707.6 4282 11,022 Indian Ocean 73.4 291.0 3963 7460 Arctic Ocean 14.1 17.0 1205 4300

Currents

Global "conveyor belt"  when deep water in the North Atlantic, sinks, moves south, and circulates around Antarctica, and then moves northward to the Indian, Pacific, and Atlantic basins. It can take a thousand years for one water molecule to circulate the conveyor belt

Coriolis Effect Effects currents In northern hemisphere currents move clockwise In southern hemisphere currents move counterclockwise

Surface currents Deep currents The upper 400 meters of the ocean (10%) Effected by Solar heating Winds Coriolis Effect Deep currents 90% effected by denisty

Arctic Ocean Atlantic Ocean Pacific Ocean                                                                                                                       Indian Ocean On your map, color the warm currents red and the cold currents blue. Label the 4 oceans.                                                           

Global wind patterns Account for surface currents

Making Currents

Tides

Tides The rise and fall in sea level is called a tide. One low-tide/high-tide cycle takes about 12 hrs and 25 min. Tidal range is the difference in ocean level between high-tide and low-tide

What is the Tidal Range? HT = 30 ft, LT = 20 ft HT = 20 ft, LT = 12 ft

What causes tides? The gravitational forces of the moon and sun on the water causes the tides.. The moon, being nearest, has the greatest effect even though the sun is the larger of the two.

Gravitational Effect of the Moon Two big bulges of water form on the Earth: one directly under the moon another on the exact opposite side As the Earth spins, the bulges follow the moon.

Gravitational Effect of the Sun Spring Tides Earth, Moon, and Sun are lined up High Tides are higher and Low Tides are lower than normal New moon, full moon

Gravitational Effect of the Sun Neap Tides Earth, Moon, and Sun form right angles High Tides are lower and Low Tides are higher than normal Quarter moon Comes twice a month: 1st and 3rd quarters of mood

Ocean tides at the Bay of fundy http://www.youtube.com/watch?v=Ead8d9wVDTQ Tidal wave (national geographic) http://www.youtube.com/watch?v=4DlqVuNMydk Ocean odyssey http://www.youtube.com/watch?v=Rn_ycVcyxlY Ocean tides: http://www.youtube.com/watch?v=kHvBUDk7kkQ Tidal wave Alternative energy http://www.youtube.com/watch?v=tSBACzRE3Gw

How are Tides Predicted?

Waves

Waves A Wave is a rhythmic movement that carries energy through matter or space. In oceans, waves move through seawater

Waves Caused by: Wind Earthquakes Gravitational force of the Moon and Sun.

Wave Movement When a wave breaks against the shore, the crest outruns the trough and the crest collapses. Called a breaker. In this case, water does move forward and backward.

Waves Caused by Wind When wind blows across a body of water, friction causes the water to move along with the wind. Wave Height depends on – Wind speed Distance over which the wind blows Length of time the wind blows

What Makes A Wave? Let’s Make A Wave

Tsunami Hurricane Ocean Storms Typhoon El Nino Cyclone

Ocean Weather, Temperature, and Tides Resources: Neptune’s Web Ocean Weather, Temperature, and Tides Ocean Planet Exhibit in the Smithsonian Museum of Natural History Secrets at Sea Game

Let's Play Jeapordy