1. Ocean Motion Ms. Corey 6 th Grade Earth Science

2. Ocean Water It is thought that volcanoes formed the oceans It is thought that volcanoes formed the oceans When ancient volcanoes erupted they gave off water that later condensed and filled low areas called basins When ancient volcanoes erupted they gave off water that later condensed and filled low areas called basins

3. Ocean Water 70% of earth is covered by oceans 70% of earth is covered by oceans Oceans contain salts from rivers and groundwater Oceans contain salts from rivers and groundwater These salts are made of calcium, magnesium and sodium from rocks and minerals These salts are made of calcium, magnesium and sodium from rocks and minerals Sodium and chloride are the most abundant elements Sodium and chloride are the most abundant elements

4. Ocean Water Chlorine gas is added by volcanoes Chlorine gas is added by volcanoes Sodium and Chlorine combine to create salt (NaCl) Sodium and Chlorine combine to create salt (NaCl) Halite is the name given to the salt we use on our food Halite is the name given to the salt we use on our food Desalination is the process of removing salt from ocean water Desalination is the process of removing salt from ocean water

5. Ocean Currents There are two types of ocean currents There are two types of ocean currents Surface currents powered by the wind Surface currents powered by the wind Density currents caused when more dense (heavier) seawater sinks under less dense (lighter) seawater Density currents caused when more dense (heavier) seawater sinks under less dense (lighter) seawater

6. Ocean Currents

7. The Gulf Stream that causes our weather is a surface current The Gulf Stream that causes our weather is a surface current The Coriolis Effect also effects surface currents The Coriolis Effect also effects surface currents The Coriolis Effect is caused by the rotation of the earth The Coriolis Effect is caused by the rotation of the earth If you threw a ball straight into the air, and it stayed up there long enough, it would not come back to you If you threw a ball straight into the air, and it stayed up there long enough, it would not come back to you

8. Coriolis Effect

9. Ocean Currents Surface currents are important because they distribute heat around the globe Surface currents are important because they distribute heat around the globe Upwelling circulates cold water from deep below to the ocean surface Upwelling circulates cold water from deep below to the ocean surface

10. Upwelling

11. Ocean Waves and Tides Crest is the highest point of a wave Crest is the highest point of a wave Trough is the lowest point of a wave Trough is the lowest point of a wave

12. Ocean Waves and Tides Wind causes waves when it blows across the water Wind causes waves when it blows across the water Even if the wind stops blowing a wave can continue on to shore Even if the wind stops blowing a wave can continue on to shore

13. Ocean Waves and Tides A tide is the rise and fall of the sea level and it caused by a short wave that covers a HUGE area A tide is the rise and fall of the sea level and it caused by a short wave that covers a HUGE area The earth and moon together cause most tides, but the sun also plays a small part The earth and moon together cause most tides, but the sun also plays a small part It is the gravitational pull of the moon and sun that causes tides It is the gravitational pull of the moon and sun that causes tides

14. Tides

15. Ocean Life Jellyfish Sea Cucumber Anemone Eel Starfish Octopus