1. Waves

2. Important Pts. To Remember The transfer of ENERGY from wind to water makes waves. The waves move, NOT the water

3. Wave Parts

4. When waves come near the shore, their wave height INCREASES.

5. 2 Types of Waves Deep Water and Surface Waves: Deep-Water waves move in water deeper than one-half their wave length. They are denser and slower. They become surface waves when they move toward the shore. They affect the climate on continents.

6. Tides

7. What are tides? The periodic rise and fall of ocean water. Influenced by the sun and the moon’s gravitational pull.

8. High Tides When part of the ocean is directly facing the moon, the moon’s gravity is pulling the ocean water into a bulge. At the same time, water on the opposite side of the Earth bulges because of the Earth’s rotation and motion of the moon.

9. Low Tides When high tides occur, water is drawn away from the area between the high tides, which causes low tides to form.

10. Timing of Tides The moon revolves around the Earth much more slowly than the Earth rotates. High and low tides occur twice a day, approx. every 12 hrs. Ex. If the first high tide of the day occurs at 2 a.m. the next high tide will occur at 2 p.m.

11. Spring Tide Sun, moon and earth are in a line. Occurs twice every 28 days.

12. Neap Tide The sun, earth, and moon are at a 90 degree angle. Occurs twice every 28 days.

13. Currents Streamlike movements of ocean water, caused by wind, that follow a pattern.

14. Surface Currents Horizontal streamlike movements of water that is caused by wind and that occur at or near the surface of the ocean. Like blowing on hot chocolate: forms ripples Affect the climate on continents by moving cold and warm water around the globe.

15. Deep Currents Streamlike movements of ocean water far below the surface. Denser and slower than surface currents due to temperature and salinity.