2.Compare and contrast: Currents-waves 3.How is surface current different from a current near the coast? 4.Compare the types of tides.
Answers 1. Waves: A wave is the up and down movement of surface water Tsunami: A very large ocean wave caused by an underwater earthquake or volcanic eruption. Tide: The rise and fall of the water level of the water in the ocean. Storm Surage: The mound of water that pushes onto shore in a hurricane El niño:A warming of the surface water of the eastern and central Pacific Ocean, occurring every 4 to 12 years and causing unusual global weather patterns. An El Niño is said to occur when the trade winds that usually push warm surface water westward weaken, allowing the warm water to pool.
2. 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. 4.
QUESTIONS Salt in the oceans comes from rocks (F) Most from the salt is sodium chloride= table salt (T) Water pressure is the amount of salt water (F) Ocean have the saltiest water on Earth(F) The salinity of the oceans change a lot from place to place (F) Something else that depends on the ocean pressure is depth(F) At the surface the water is warmed by sea animals (F) 75% of the oceans has a temperature between 0° c and 3°c (F) To study the oceans scientist use planes or helicopters (F) Some of the conditions of the oceans depends on the water surface (F)
ANSWERS FALSE: Salt in the oceans comes from minerals that are washed out from land. The downward push of water is called water pressure. The saltiest water is of Dead Sea, a lake from Israel. The salinity doesn´t change much from place to place. Something else that depends on the ocean´s pressure. At the surface the water is warmed by the sun and by warm air above the surface. Is about 90%. The ocean has a temperature between 0°C and 3°C. To study the ocean the scientist use submarines. But other condition depends on the temperature not water surface.