Oceans Salinity

Question 1

Amount of salt in the ocean

Answer 1

Salinity

Question 2

A large stream of moving water

Answer 2

Current

Question 3

Currents on the surface of the water

Answer 3

Surface currents

Question 4

The effect of winds caused by Earth’s rotation

Answer 4

Coriolis effect

Question 5

A pattern of temperatures and precipitaion

Answer 5

Climate

Question 6

Strange patterns in the wind

Answer 6

El Nino

Question 7

A current carrying cold water

Answer 7

Deep current

Question 8

Surface water and deep ocean water mixing

Answer 8

Upwelling

Question 9

The oceans _______ begins with the early stages of Earth’s history when the ocean covered much of the surface of the planet

Answer 9

saltiness

Question 10

Undersea _______ erupted spewing chemicals into the water.

Answer 10

volcanoes

Question 11

Lava y built up a areas of land. Rain fell on bare land washing _______ from the rocks into the ocean.

Answer 11

chemicals

Question 12

Over time, these _______ substances built up to the levels present in the ocean today.

Answer 12

dissolved

Question 13

On average the ocean contains about 35 grams of salt– that is _______.

Answer 13

35 parts per thousand

Question 14

The total amount of dissolved salts in a sample of water is the _______ of that sample.

Answer 14

salinity

Question 15

_______ (table salt) is the salt present in the greatest amount in ocean water

Answer 15

Sodium chloride

Question 16

What are the other ions found in ocean water?

Answer 16

Magnesium, calcium nitrogen, phosphorus

Question 17

Salts are added to seawater by _______ eruptions and the weathering and erosion of rocks.

Answer 17

volcanoes

Question 18

In most parts of the ocean, the salinity is between _______ parts per thousand.

Answer 18

34-37

Question 19

Near the oceans surface, rain, snow and melting ice add fresh water _______.

Answer 19

lowering salinity

Question 20

Salinity is _______ near the mouths of large rivers like the amazon or Mississippi. Why do you think this is?

Answer 20

lowered.

Rivers add fresh water to the ocean.

Question 21

Evaporation from the ocean _______ salinity because the salt is left behind. Give an example

Answer 21

increases

In the Red Sea, the climate is hot and dry, the salinity can be as high as 41 parts per thousand.

Question 22

Near the poles, salinity is _______ because the surface water freezes into ice and the salt is left behind.

Answer 22

higher

Question 23

At what temperature does ocean water freeze/

Answer 23

-1.9 C degrees

Question 24

Salt water is _______ dense than fresh water.

Answer 24

more

Question 25

Because seawater has greater density, it has greater buoyancy, meaning that less dense objects will float _______ in it.

Answer 25

better

Question 26

The broad surface of the ocean _______ energy from the sun.

Answer 26

absorbs

Question 27

Near the equator, surface ocean temperatures are highest. Why?

Answer 27

Sunlight is more powerful near the equator.

Question 28

The temperature drops as you travel _______ from the equator

Answer 28

away

Question 29

Ocean water also changes with _______.

Answer 29

depth

Question 30

Why is warm water at the top of the ocean?

Answer 30

Because it is less dense

Question 31

Where is the coldest water in the ocean?

Answer 31

at the bottom