Lesson 18-2, Cloze part 2.  Page 280-284 in red science workbook.


FACTOID:  density is the amount of something in an object.  Ex. a rock is more dense than a marshmallow.  Dirt is denser than water.


18. ___________________ is a vertical circulation in the ocean tha tbrings deep, cold water to the ocean surface.


19.  A _______________  _______________ forms when a mass of seawater becomesmore dense that the surrounding water.


20. Changes in __________________ and ___________________ work together to create density currents.


21.  There are two important density currents.  One begins  in_________________________ and the other begins in the _____________  ________________  _____________________.


22. The Mediterranean Sea also has a _________________  _________________.


23. Which step in the water cycle is responsible for a density current in the Mediterranean Sea?



Look at the map on the back of this page.  Remember the video you watched earlier about the currents.  I want you to draw 2 gyres in the Pacific Ocean and 2 gyres in the Atlantic Ocean.  Be sure to label where cold water and warm water currents are found in your gyres.  Ask the substitute teacher to replay the currents video.


worldmapforcurrents.jpg