Chapter 18, lesson 2, Ocean Currents.

Read item 5 under "Currents Lesson" to find answers for these blanks.  There are several questions with ** beside them.  These are not in the book, but are facts that you need to know and use.  Some of these facts are from your note.

1. A _____________  _____________is a current that moves water horizontally, or parallel to Earth’s surface.  Parallel means side by side like railroad tracks.

2. _____________  _____________are powered by wind blowing over the water.

3. Sailors have relied on _____________  _____________ and winds to make sailing easier.

4. The _____________  _____________is the shifting of winds and surface currents from their expected paths because of Earth’s rotation.

5. The currents north of the equator circle to the __________.

6. Currents south of the equator circle to the ___________.

7. Look at the map on page 518.  There are some red arrows and blue arrows.  Why are they different colors and what do you think they represent?

Explain:

8. If you follow those arrows they seem to change from blue to red near the Earth’s _______________________. The blue arrows are found closer to the ______________________ __________________________.

**9. **Surface currents spin in circles because of the _______________  effect.  These spinning surface currents are called GYRES.

10. Sailors always have used _____________  _____________to make traveling easier.

11. The Gulf Stream is a 100-km-wide _____________  _____________in the Atlantic Ocean.

**12. **The Gulf Stream is part of the North Atlantic Gyre.  A gyre is a _______________ current that spins because of the ______________ effect.

**13. **The North Atlantic Gyre carries warm water towards cold areas and cold water towards the warm areas.

14. The North Atlantic ________ carries ________ water from the Equator across the Atlantic over to Europe where it causes it to have a MUCH WARMER climate than it should have!!!

15. _________________  ____________________ help scientists track currents.  They have cards inside them to tell what they are.

16. Currents on the west coasts of continents begin near the ___________ where the water is colder.

17. Currents on the east coast of continents start near the ___________ where the water is warmer.