1. What percent of the Earth is water? a.97% b.50% c.85% d.70% CRCT Question

2.  Table: 10 points  Cartoon: 40 Points  Paragraph: 50 Points  Introduction: Should say #1 pollution problem in Gwinnett  Paragraphs: Complete sentences. No symbols such as “=.” Reasons why you choose #1 pollution problem. Why you didn’t choose the other problems  Conclusion: Restate your pollution problem and use a good closing topic Fred the Fish

3.  I will give you 30 minutes to finish the test (if needed)  Place in front bin when you are done  Silently read until everyone is done Test

5. Tic-tac-toe  You pick the three activities you want to do.  They can be across, diagonal, or up and down.  To help you with time management, I’ve listed the dates for each activity.  I will give you guidelines for each activity as we go  Please ask questions along the way

6. Ocean Properties For each of the following determine whether you agree or disagree. 1.70% of the Earth is covered by water. 2.NaCl is the most abundant element in ocean water. 3.Gases in the water do not vary with depth. 4.The sun is the major source of heat for the ocean. 5.Warm water is more dense than cold water. 6.Salty water is less dense than fresh water. 7.Surface water is usually warmer than deep water. 8.For every 1000 grams of ocean water, 35 of those grams are salt. 9.Three sources of salt are – wind, waves, and water. 10.Salt water wants to sink below fresh water.

7. Oceans Properties Coffee Talk

8. Tagging the Text

9. The World’s Ocean  70% of the Earth is covered by water.  97% of the Earth’s water is in oceans.  The sun plays a key role in the water cycle.

10. Properties of the Ocean  Ocean water is about 96% pure water or H ₂O. The most abundant elements in ocean water are hydrogen (H) and oxygen (O). The other 2 most abundant elements are chlorine and sodium.  Oceanographers are scientists who study the ocean.

11. Ocean Chemistry Solids in Ocean Water  Sodium Chloride (NaCl) is the most abundant salt.  Salinity is the amount of dissolved salts in ocean water  Three sources of salt are – Volcanic activity, waves, and erosion  For every 1000 grams of ocean water, 35 of those grams are salt (3.4% of mass). This means that 100 pounds of ocean water would contain 3.5 pounds of salt.  Why is the ocean salty? Water that moves across the earth dissolves the salt and carries it to the ocean. When water evaporates from the ocean, it leaves the salt behind.

12. Gases in Oceans  Most abundant gases in the ocean are nitrogen, carbon dioxide, and oxygen.  Gases vary with depth, more are at the surface.

13. Temperature & Pressure of the Ocean  Sun is the major source of heat for the ocean.  Warm water is less dense than cold water.  As you go deeper, the temperature drops.  Surface water is usually warmer than deep water  Pressure of the water increases with depth because more water is on top.  Salty water is more dense than fresh water. That means that salty water wants to sink below fresh water.  Cold water is more dense than warm water. That means that cold water wants to sink below warm water.  These properties cause water to want to move around. This affects currents.