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The Movement of Ocean Water

The Movement of Ocean Water. Chapter 14 Section 1. Bellringer. Imagine you are stranded on a desert island. You stuff a distress message into a bottle & throw it into the ocean. Is there any way to predict where your bottle may land?. Bellringer.

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The Movement of Ocean Water

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  1. The Movement of Ocean Water Chapter 14 Section 1

  2. Bellringer • Imagine you are stranded on a desert island. You stuff a distress message into a bottle & throw it into the ocean. • Is there any way to predict where your bottle may land?

  3. Bellringer • Is there any way to predict where your bottle may land? • Yes, ocean water contains stream-like movements of water called currents. These currents are influenced by a number of factors.

  4. Currents Objectives • Describe surface currents. • List the three factors that control surface currents.

  5. Chapter 14 Section1 Currents One Way to Explore Currents • Ocean water contains streamlike movements of water called ocean currents. • Norwegian explorer Thor Heyerdahl proved his theory that ocean currents influenced human migration by using a raft that was powered only by wind and ocean currents.

  6. Chapter 14 Section1 Currents Surface Currents • Horizontal, streamlike movements of water that occur at or near the surface of the ocean are called ocean currents. • Surface currents are controlled by three factors: global winds, the Coriolis effect, and continental deflections.

  7. Chapter 14 Section1 Currents • Global Winds: Winds that blow across the Earth’s surface create surface currents in the ocean. Different winds cause currents to flow in different directions. • The Coriolis Effect is the apparent curving of moving objects from a straight path due to the Earth’s rotation.

  8. Chapter 14 Section1 Currents • Continental Defections: When surface currents meet continents, the currents deflect, or change direction.

  9. Chapter 14 Section1 Currents Surface Currents, continued • Taking Temperature Currents are also affected by the temperature of the water in which they form. • The next slide shows Earth’s surface currents. Warm-water currents are shown as red arrows, and cold-water currents are shown as blue arrows.

  10. Chapter 14 Section1 Currents

  11. Currents Objectives • Describe surface currents. • List the three factors that control surface currents.

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