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# Social studies

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### Transcript

• 1.
• 2. SOCIAL<br />STUDIES<br />
• 3. EARTH´S OCEANS<br />
• 4. QUESTIONS…<br />Salt in the oceans comes from rocks (F)<br /> Most from the salt is sodium chloride= table salt (T)<br />Water pressure is the amount of salt water (F)<br />Ocean have the saltiest water on Earth(F)<br />The salinity of the oceans change a lot from place to place (F)<br />Something else that depends on the ocean pressure is depth(F)<br />At the surface the water is warmed by sea animals (F)<br />75% of the oceans has a temperature between 0° c and 3°c (F)<br />To study the oceans scientist use planes or helicopters (F)<br />Some of the conditions of the oceans depends on the water <br />surface (F)<br />
• 5. ANSWERS…<br />FALSE:<br />Salt in the oceans comes from minerals that are washed out from land.<br />The downward push of water is called water pressure.<br />The saltiest water is of Dead Sea, a lake from Israel.<br />The salinity doesn´t change much from place to place.<br />Something else that depends on the ocean´s pressure. <br />At the surface the water is warmed by the sun and by warm air above the surface.<br />Is about 90%. The ocean has a temperature between 0°C and 3°C.<br />To study the ocean the scientist use submarines.<br />But other condition depends on the temperature not water surface.<br />
• 6. EARTH´S OCEANS<br />
• 7. VIDEO:<br />ONCE UPON A <br />TIDE<br />
• 8. Taking Notes<br />Once upon a tide<br /><ul><li>Fish are dying .
• 9. Corals are Bleaching.
• 10. Ocean is very important to humans.
• 11. The ocean is a big ecosystem. (Contains most plants and animals).
• 12. Everyone has forgotten the ocean.
• 13. The ocean is very interesting,misterious and has many secrets.
• 14. The ocean is the home of many living things.
• 15. Fish are filled of venom.
• 16. The ocean is warming.
• 17. Oceans provide some medicines.
• 18. Humans cause all the harm to oceans.
• 19. Oceans are beautiful and we shouldn’t harm it.
• 20. Oceans need our help.
• 21. Oceans have amazing things
• 22. Oceans are warming</li></li></ul><li>HOW DOES <br />OCEAN <br />WATER MOVE? <br />
• 23. QUESTIONS…<br />Define:<br /><ul><li>Waves
• 24. Tsunami
• 25. Tide
• 26. Storm Surage
• 27. El niño</li></ul>2.Compare and contrast: Currents-waves<br />3.How is surface current different from a current <br />near the coast?<br />4.Compare the types of tides.<br />
• 28. ANSWERS<br />1.<br />Waves: A wave is the up and down movement of surface water<br />Tsunami: A very large ocean wave caused by an underwater <br />earthquake or volcanic eruption.<br />Tide: The rise and fall of the water level of the water in the ocean.<br />Storm Surage: The mound of water that pushes onto shore in a hurricane<br />El niño:A warming of the surface water of the eastern and central Pacific Ocean, <br />occurring every 4 to 12 years and causing unusual global weather patterns. <br />An El Niño is said to occur when the trade winds that usually push warm surface <br />water westward weaken, allowing the warm water to pool.<br />
• 29. 2.<br />3. If the winds don’t blow toward the west the warm surface water, stays near the coast. The deep, cold currents don’t reach the surface, and the coastal water stays very warm.<br />4.<br />
• 30. VIDEO:<br />THE MOON<br />AND THE<br />TIDES<br />
• 31.
• 32.
• 33. WHAT FORCES<br />SHAPE<br />SHORELINES?<br />ACTIVITY<br />
• 34. QUESTIONS…<br />Define:<br /><ul><li>Shore