Oceanography

There are __________ main ocean basins.

• 2

• 4

• 6

• 7

Which is the largest ocean basin?

• Pacific

• Atlantic

• Indian

• Arctic

Ocean water is different from river water because it is ______________.

• salty

• cold

• warm

• moving

_______________ is the total amount of solid material dissolved in seawater.

• Salinity

• Density

• Cloudiness

• Current

Most of the salt in seawater is _______________.

• MgCl2

• KI

• CaSO4

• NaCl

The average salinity of the ocean is _______________ ppt.

• 45

• 35

• 2

• 15

The salinity of the ocean is the same everywhere.

• True

• False

The salt in the ocean comes mainly from __________________.

• the air

• plants

• rocks

• outer space

Which of the following decreases the salinity of the ocean?

• Freezing of seawater

• Melting of ice from glaciers

• Evaporation of seawater

Which of the following INCREASES salinity of seawater?

• rain

• freezing of seawater

• groundwater flow

• river runoff