Tuesday, January 18, 2011

Grade 8 Week 13: Under the Sea.

After working on the Earth's waters in general, we now focus on the main point of this unit: the Ocean.

What features are found at the bottom of the ocean?
What affects the density of salt water?
What effects do different densities of water have on the ocean?


Contract 13 gives choices to diagram the oceans features, examine the effects of the ocean on weather and climate, or to focus on the El Niño
 event.

6 comments:

Stuart said...

Salt affects the density of salt water.

Cam said...

The amount of salt effects how dence salt water is. The more salt there is in water, the dencer the water will be.

Willeford said...

Trenches, which are very deep in the ocean, are sometimes the consistency of jello but they seem to have the same amount of salt that the ocean above has so how does this happen? Sometimes density is affected by depth because the closer you get to the core of the Earth, the more pressure there is. This causes the molecules of the water to be forced together and if they are compacted close enough the water will become a solid.

Matt Olig said...

Trenches are at the bottom of the ocean which are basicly from the collising of land with subduction occuring i think? haha Salinity, which is the salt content of water affects how dense salt water is. Also trade winds can affect the density of water. The more dense something is the more pressure there is. Which is why when you go further down where the pressure is higher from the core,you ears may pop. This is from the changes in air pressure, however there are many more.

Vicki Payne said...

The amount of salt affects the density of salt water. Density of the water can be effected by the depth of the water.

Anonymous said...

Salt water's density is determined by how much salt is in it. If there's more salt, the water will be denser.