Exploring Earth's Oceans and Alt Energy Sources

1. Do Now Alt Energy Sources _____burning of wood or dung _____type of resource sun, wind, water 3. _____moving of sediment 4._____various methods humans use to save the soil 5. ___what does the anchoring of plant roots prevent

2. What are the names and locations of the major oceans? What is salinity? What effects the salinity of the ocean? Were does the salt in the ocean come from?

3. 1. Pacific-largest • Atlantic • Indian • Southern • Arctic-smallest • =

4. 2. Salinity is the amount of salt in the ocean 35 gram per kilogram of water

5. 3. Factors that affect salitinty? • CLIMATE-hot,dry is saltier • WATER MOVEMENT-no circulation saltier ex sea, gulf, bay

6. 4. The salt in the ocean comes from • Minerals washed from rivers and streams • Waves that pound on rocks • Erupting volcanoes • Hot springs

7. Key Questions What are the percentages of water on Earth? What is the most important function of the ocean? How does the salinity of the ocean stay balanced when gallons of freshwater is poured into the ocean each day? How does ocean water differ from fresh water? Where is greatest amount of Earth’s fresh water? Which processes are responsible for the distribution of freshwater to inland locations on the continents? Where do most modern cities obtain their drinking water from?

8. 1. Salt water is 97% of water on Earth. • Fresh water is 3 %. (2 % is ice and 1 % is liquid). • The most important function of the ocean is giving off water vapor into the atmosphere. 3. The salinity stays balanced water is continuously evaporated back out of the ocean into the atmosphere.

9. 4.Ocean water is different that fresh water because ocean water has a higher concentration of sodium chloride. • 5. The greatest amount of Earth’s freshwater is located in glaciers and polar ice caps. • 6. Moving air masses are responsible for the movement of freshwater to inland locations. • 7. Most modern citiies obtain their drinking water from surface resevoirs.