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Wednesday, January 23 rd. What percent of the Earth is water? 97% 50% 85% 70%. Test Answers. Salt Water Vocab sheet. Due Monday, February 4th. Tic-tac-toe . You pick the three activities you want to do. They can be across, diagonal, or up and down.

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wednesday january 23 rd
Wednesday, January 23rd

What percent of the Earth is water?

97%

50%

85%

70%

slide3

Salt Water

Vocab sheet

Due Monday, February 4th

tic tac toe
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 

ocean properties

Ocean Properties

For each of the following determine whether you agree or disagree.

70% of the Earth is covered by water.

NaCl is the most abundant element in ocean water.

Gases in the water do not vary with depth.

The sun is the major source of heat for the ocean.

Warm water is more dense than cold water.

Salty water is less dense than fresh water.

Surface water is usually warmer than deep water.

For every 1000 grams of ocean water, 35 of those grams are salt.

Three sources of salt are – wind, waves, and water.

Salt water wants to sink below fresh water.

coffee talk
Coffee Talk

Oceans Properties

the world s ocean
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.

properties of the ocean
Properties of the Ocean

Ocean water is about 96% pure water or H₂O. 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.

ocean chemistry
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
salinity
Salinity
  • 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.
slide12

NOAA map of ocean\'s salinity.

Continents in gray

  • Salinity varies based on
  • Temperature and evaporation of water. When water evaporates, it leaves the salt behind making the water saltier (orange).

2. Closeness to a “fresh” water source like a river or icebergs causes low salinity (blue).

gases in oceans
Gases in Oceans
  • Most abundant gases in the ocean are nitrogen, carbon dioxide, and oxygen.
  • Gases vary with depth, more are at the surface.
temperature pressure of the ocean
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.

slide15

The ocean changes as you get deeper.

Less light so the living things must be able to live without light.

More pressure due to the weight of the water above.

It usually gets colder the deeper you go.

http://www.nikon.co.jp/

slide16

Density also affects the ocean.

Salty water is more dense than fresh water. That means that fresh water will “float” on top of salty water and not mix well.

Cold water is more dense than warm water. That means that warm water will “float” on top of cold water.

Both these facts make water want to move. If cold water moves on top of warm water, the difference in density will make them slowly switch places. This causes currents.

ocean properties1

Ocean Properties

For each of the following determine whether you agree or disagree.

70% of the Earth is covered by water.

NaCl is the most abundant element in ocean water.

Gases in the water do not vary with depth.

The sun is the major source of heat for the ocean.

Warm water is more dense than cold water.

Salty water is less dense than fresh water.

Surface water is usually warmer than deep water.

For every 1000 grams of ocean water, 35 of those grams are salt.

Three sources of salt are – wind, waves, and water.

Salt water wants to sink below fresh water.

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