Density is a property of matter, calculated by dividing the mass by volume. By understanding density, one can start understanding the movement of matter in the atmosphere and in the oceans. Denser materials "sink" while less dense materials "float."
The sinking of dense water (colder, saltier) and the rise of less dense water (warmer, less salt) drives global ocean currents in the thermohaline circulation currents. Animals have adapted to live at different depths of the ocean.
Strange fact: shipments lost at sea are found decades later thousands of miles away because of these deep currents, such as rubber ducks and messages in a bottle.
CK12.org Reading:
Quarter 4 Textbook 5.1 Ocean Zones
Textbook Reading:
Chapter 18 Section 2 (Ocean Currents)
Online Activities
Brainpops:
https://www.brainpop.com/science/earthsystem/oceancurrents/
https://www.brainpop.com/science/earthsystem/oceanfloor/
https://www.brainpop.com/science/earthsystem/oceanfloor/
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