EAC

Think… and answer! 1- Can you explain how precipitation affects salinity in oceans? 2- Can you explain how evaporation affects salinity in oceans?

OCEAN CURRENTS NOTES

Water Current:A stream of water flowing in a common direction.

2 Types of Currents: Deep Currents Surface Currents

1. Deep Currents Deep ocean currents are caused by differences in water temperature and salinity.

As you dive deeper into the ocean, the temperature decreases. Warm water with low salinity As you dive deeper into the ocean, the temperature decreases. As you dive Deeper into the ocean, the salinity increases. Cold water goes down, Warm water goes up Cold water with high salinity -Salty water goes down, Fresh water goes up

Partner 1 ask partner 2- As you increase in depth, what happens to the water’s temperature and salinity? Partner 2 will reply by saying: As you increase in depth, the water’s temperature ______ and its salinity _________.

2. Surface Currents Driven by prevailing wind mainly effect the upper few hundred meters of the ocean.

SURFACE CURRENTS are controlled by 3 main factors: 3. The location of the Continents. 2. Air Currents 1. Earth’s Rotation

Partner 2 ask partner 1 What 3 factors affect surface currents? Partner 1 will Reply by Saying: The 3 factors that affect surface currents are: _____________________________.

Prevailing Wind moving across the surface of the ocean causes the water to move and flow creating currents

Due to the continents, the currents are deflected to the North and South to create circular currents called gyres.

The gyres spin:clockwise in the Northern hemisphere counter-clockwise in the Southern hemisphere because of the Coriolis effect

1 to 2 What direction do ocean currents move in the northern hemisphere and in the southern hemisphere? 2 to 1 Ocean currents move _______ in the northern hemisphere and _____ in the southern hemisphere.

Surface currents can carry warm or cold water which can impact the climate in that area. Warm water Cold water

COLD CALIFORNIA CURRENT WARM GULF STREAM CURRENT WARM KUROSHIO CURRENT Cold California Current WARM South EQUATORIAL CURRENT

Atlantic Ocean Found on the East Coast of the United States Second largest ocean More inflow from rivers than other oceans Second youngest of the oceans

Pacific Ocean Found on the West Coast of the United States Largest ocean Contains more islands than other oceans Where El Niño and La Niña occur Where the Ring of Fire occurs

Artic Ocean Found at the North Pole Home of the Polar Ice Cap Smallest of the oceans

Indian Ocean Warmest ocean in the world Youngest of the oceans Affected by monsoons

Antarctic Ocean Found at the South Pole 4th largest ocean 30 million years old

OCEAN CURRENTS T-MAP OCEAN CURRENTS DEEP CURRENTS SURFACE CURRENTS _________________ __________________ __________________ __________________ There are ___ main types of ocean currents. The first ones are called ___________________ they are caused by _____________________ ________________________. As you increase in ocean depth, temperature_________ and salinity__________. The second type of ocean currents are ________________. They are driven by the ___________ and are controlled by _______________, ________________, and ________________________.

SWBAT- Explain the differences between deep currents and surface currents by completing the Ocean Currents T-map