Friday, 7 February 2014

Oceans are everywhere!


  1. Groundwater
    1. Why is groundwater important?
    2. Keywords: porosity, permeability, water table
  2. Ocean Currents
  3. Study for your test
  4. Science Fair Information
    1. Start bringing in your materials if you are collecting data during class-time.
    2. There’s a copy of this document in your Science folder to guide your Science Fair Project.  

Key Words:

  • Porosity: The amount of space of the rocks for liquids to pass through
  • Permeability: The rate of which the liquids pass through the pore space
  • Water Table: The underground surface with soil or rock that are saturated with water.

Prior Knowledge about the Ocean

The information that are written on the board are: 

  • It’s salty.  It’s saltwater.
  • You can’t drink it.
  • The ocean is about ~70 % of the Earth’s surface.
  • There are many currents.
  • There are many types of plants and animals.
  • It’s always moving
  • Sometimes, sewage and garbage is dumped into the ocean.

After discussing the prior knowledge, we talked about the basic knowledge of the ocean such as:

  • The ocean is constantly moving.
  • We get food - fish and shellfish - from the ocean.
  • It is the part of the world that we know the least about.
    • We know more about the surface of the moon than deepest parts of the ocean.  
  • Salty
  • Wavy
  • It covers about ~70 % of the world.
  • Sea creatures live in it.
  • The tides are affected the moon.  
  • We use the ocean for transportation.  
  • Phytoplankton in the ocean also produce oxygen which we breathe

Then we learned about the six oceans which are:

  1. Atlantic
  2. Pacific
  3. Indian
  4. Arctic
  5. Southern (Antarctica)

Then we learned about the global circular surface ocean current

Then with clues given, we had to predict and draw the surface ocean currents. The clues were:
1) Temperature

In this picture we can see where the wind is moving to. 

  • 3) Coriolis Effect
    • The Earth spins on its axis.  Fluids (the atmosphere and the oceans) will be deflected by its spin.  
    • Currents in the Northern Hemisphere tend to move clockwise.
    • Currents in the Southern Hemisphere tend to move counterclockwise
    • from Nova PBS

In this picture, it is visible that this is happening in the Southern Hemisphere since it is moving counterclockwise. 

    • 4) Surface Currents
      • The animation is a summary of satellite data from NASA tracking all the surface currents.  This video shows the details of all the currents.  Look at the patterns to try to figure out the global currents.
      • Video of NASA: Perpetual Ocean

The drawing should look something like this:

This shows the wind movement and the movement of the ocean currents. 

Then in the end of the class, Mr. Pro did an experiment to show the surface ocean currents:

1 comment:

  1. The tides are affected the moon: What do you mean?


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