Oceans+1+review


 * Honors Earth Science Objectives Water World**
 * Please enter your answers using only your first name or user name!**


 * //Purple has been checked and is correct. //**

These next questions are about the graph below: What is the name of the zone of the ocean at A?  the surface-mixed zone. -molly What is the name of the place where salinity rapidly changes (B). Hint: not a zone. the thermocline. -molly the pycnocline-nicole Is salinity at the surface higher or lower than in the deep zone? What could account for why this would happen? they could be the near the horse latitudes where a lot of evaporation is occuring. -molly lower - Ron Now try this graph: What is the depth of the thermocline? about 300 --Kelsey What is the name of the zone labeled A? What about zone B? Zone A: Deep Zone Zone B: Transition Zone. -molly Where on Earth must this profiler be located?  Near the horse latitudes - Ron

1. Why are the oceans salty? lakes and rivers all eventually run off into the ocean at one point or another, giving the ocean the salt that is contained in smaller amounts in the lake and river water. –amy //**volcanic eruptions. -molly  2. Why don’t the oceans get saltier over time? Because biological animals make shells, coral reefs, and rocks and mineral precipitate on the bottom (limestone - morgan   //** Because the biological animals take different salt particals from the ocean and form the salt into their shells. - Morgan   3. Outline the sources (2) and sinks (3) of ocean salts.
 * // What is the other source of salt?
 * // Morgan, What do these animals and reefs listed above do to prevent the oceans from getting saltier?
 * Source **-runoff from rivers and volcanic eruptions ** Sink **- 1. animals use salts to build shells 2. coral reefs 3. and minerals precipitate on the bottom - Morgan

4. What factors increase the salinity of ocean water? High evaporation, freezing and sometimes volcanic eruptions, but it doesn't effect the bottom of the ocean – morgan   4B. What factors decrease it? precipitation,melting, high biological activity (coral reefs) and runoff - morgan <span style="color: rgb(153,102,255);"> 5. What is the thermocline? Why does it exist? the thermocline is an area in the transition zone of the ocean where the temperature rapidly swings from warm to cold. it exists because the water is getting deeper and sunlight is unable to reach the deeper parts of the ocean, making it colder. -amy
 * //<span style="color: rgb(153,102,255);"> What doesn’t effect the bottom? //**

6. Why isn’t there a thermocline in polar areas? there isn't a thermocline in polar areas because the temperature at the surface of the ocean, in the surface mixed zone, is similar to the temperature of the water in the deep zone. this happens because there is not much sunlight in polar areas. -amy

8. What is the pycnocline? Why does it exist? the pycnocline is similar to the thermocline, but it is based on the salinity of the water. it is when the salinity swings rapidly from the top of the surface mixed zone to the deep zone. -amy

9. Why isn’t there a pycnocline in polar areas? Because it is always cold, the temp doesnt change there for the density doesn't change- morgan 10. What are the 3 layers of the ocean, from surface to floor? <span style="color: rgb(240,0,255);">surface, <span style="color: rgb(153,102,255);">transition zone, deep zone –kelsey <span style="color: rgb(240,0,255);"> <span style="color: rgb(240,0,255);"> <span style="color: rgb(237,79,69); font-family: 'Trebuchet MS',Helvetica,sans-serif;">surface-mixed zone. -molly //** <span style="color: rgb(153,102,255);">11. What 3 factors cause surface mixing in the ocean? Wind and Waves, currents and tides - Morgan
 * // Not surface…. What is it really?

12. How do pressure, salinity and temperature affect the rate that gas dissolves in the ocean? **<span style="color: rgb(35,70,116); font-family: 'Comic Sans MS';">The higher salinity the faster that gas dissolves. **<span style="color: rgb(35,70,116);"> The lower pressure makes it dissolve faster. The lower temperature gas wont dissolve as quick as higher. –Dani <span style="color: rgb(35,70,116); font-family: 'Comic Sans MS';"> //**<span style="color: rgb(237,79,69); font-family: 'Trebuchet MS',Helvetica,sans-serif;">The most CO2 is dissolved in cold water, near the bottom of the oceanm and in water containing very little salt.-molly <span style="color: rgb(153,102,255);"> 13. Explain the ocean’s role as a carbon dioxide sink. (3 main types of sinks) atomosphere via the ocean; limestone,<span style="color: rgb(153,102,255);"> <span style="color: rgb(153,102,255);"> plants; algage and plankton, <span style="color: rgb(153,102,255);"> coral reefs – Morgan <span style="color: rgb(153,102,255);"> **// Explain what you mean in the first line- what about limestone? //**
 * // Dani, it’s not the SPEED- it’s HOW MUCH dissolves. So how would you rewqrite the above statements?