Chapter 17 Extra Credit                  (4pts.)

 

1.                When Earth is viewed from space, it appears _____________ in color.

 

2.                Earth's four oceans are the Atlantic, Pacific, Indian, and ____________.

 

3.                The scientific study of the oceans is called ______________.

 

4.                The battery-powered submarine which holds three people and is used in oceanographic research is named ______________.

 

5.                The two most common ions found in sea water are __________ and __________.

 

6.                The ocean's surface layer is called the _____________.

 

7.                The temperature of the mixed layer depends on both seasonal changes and ______________.

 

8.                The ocean water layer where rapid temperature change takes place is the _____________.

 

9.                One of the most abundant kinds of phytoplankton is _____________.

 

10.           Because there are no plants in deep ocean waters, these waters are rich in ________________.

 

11.           A hot spring with water at about 380 degrees Celsius and that occurs at mid-ocean ridges is called a(n) ______________.