Ocean Currents Grade 7

Question 1

Earth’s rotation causes ______ & ________,

Accepted Answer

wind and ocean currents

Question 2

Ocean circulation has an important influence on ________ ________

Accepted Answer

Earths climate

Question 3

If these occur at or near the surface of the ocean & caused by wind, they are called: _______________

Accepted Answer

surface currents

Question 4

the difference in ________ causes the Coriolis effect

Accepted Answer

speed of rotation

Question 5

Cold water travels along ocean bottom then rises to the surface as _______ ___________ moves away; cold water absor

Accepted Answer

warm ,surface water

Question 6

_____________: amount of matter in a given space or volume

Accepted Answer

density

Question 7

~most abundant gases in the atmosphere are also abundant in the ocean: _________, ____________, _________, and ________

Accepted Answer

argon, oxygen, nitrogen, carbon dioxide

Question 8

water, _________ _________, _______ _______, and _______ ______ ______

Accepted Answer

dissolved gases, dissolved solids, energy around Earth

Question 9

High salinity = _________

Accepted Answer

denser

Question 10

_________________: movement of water that results from density differences

Accepted Answer

convection curretns

Question 11

In the Northern Hemisphere, currents are deflected to the _______

Accepted Answer

right

Question 12

~most familiar dissolved solid in ocean water is sodium chloride (NaCl) = _____ _____

Accepted Answer

table salt

Question 13

___________________: movements of ocean water far below the surface; caused by differences in water density

Accepted Answer

deep currents

Question 14

surface currents & deep currents together form ________________

Accepted Answer

convection currents

Question 15

The major source of energy that powers surface currents is the _________

Accepted Answer

sun

Question 16

ocean water at the surface becomes _______, then _______ & moves from the surface todeep ocean,forming _deepoceancurren

Accepted Answer

denser,sink,deep ocean curretns

Question 17

affected by temperature & _____________: a measure of the amount of dissolved salts or solids in a liquid

Accepted Answer

salinity

Question 18

This is the rest of qs 7 except on the _________, to be deflected from the paths they would take if Earth did not rotate

Accepted Answer

equator

Question 19

_____________________: deflection of moving objects from a straight path due to Earth’s rotation

Accepted Answer

coriolis effect

Question 20

Cold water is ________ than _______________

Accepted Answer

denser,warm water

Question 21

This is then carried from the equator to the _______

Accepted Answer

poles

Question 22

warm water ________ energy to its surroundings & cools

Accepted Answer

loses

Question 23

when water warms, it expands and becomes ___________, so it _______ above cold water

Accepted Answer

less desne,rises

Question 24

most reach depths of about _______, but some go deeper

Accepted Answer

100 m

Question 25

Pressure differences in the atmosphere cause ________ to form

Accepted Answer

winds

Question 26

many nutrients, such as nitrogen & phosphorus are important for __________& _________ growth

Accepted Answer

plant and sea

Question 27

convection currents carry about ___% of the energy transported around Earth’s surface

Accepted Answer

40

Question 28

near equator, ocean absorbs large amounts of _______ ______

Accepted Answer

solar enery

Question 29

Heated air is warmer and _______

Accepted Answer

less dense

Question 30

Deflected to the _______ because wind & water move east more slowly than Earth rotates beneath them

Accepted Answer

right

Question 31

~it then becomes more dense & _______

Accepted Answer

sinks

Question 32

points on Earth near the equator travel faster than points ______________________

Accepted Answer

closer to the poles

Question 33

ransports, or moves, more water each year, than is transported by all the __________________ combined

Accepted Answer

all the rivers in the world

Question 34

Wind & water traveling south from the north pole actually go toward ________ instead of straight south

Accepted Answer

southwest

Question 35

the sun heats the air near the __________ more than it heats air at other latitudes

Accepted Answer

equator

Question 36

Rising warm air creates an area of _________________ near the equator

Accepted Answer

low pressure

Question 37

water at the surface absorbs energy _________________ & carries this energy to _________ regions

Accepted Answer

from the sun,colder

Question 38

_______________________ form because of this

Accepted Answer

pressure differnces

Question 39

Energy is released into the ___________

Accepted Answer

atmosphere

Question 40

_____________ streamlike movements of water

Accepted Answer

ocean curretns

Question 41

when water cools, it ________ & becomes more dense and _______

Accepted Answer

contracts,sink

Question 42

*gases in the atmosphere are absorbed by ocean water at the ocean’s _________

Accepted Answer

surface

Question 43

deep currents flow along ocean floor or along the top of another ______________________

Accepted Answer

another layer of dense water

Question 44

period of rotation is always __ hours

Accepted Answer

24

Question 45

When surface currents meet continents, currents are deflected and _________ _______

Accepted Answer

change directions

Question 46

the deepest & densest water in the ocean is ____________________, near Antarctica

Accepted Answer

Antartic Bottom water

Question 47

what are 3 factors affects ocean currents?

Accepted Answer

continental deflections,the coriolis effect,and global winds

Question 48

__________: the movement of deep, cold, and nutrient-rich water to the surface

Accepted Answer

upwelling

Question 49

_______: winds that blow across the surface of Earth’s oceans and push water across Earth’s surface

Accepted Answer

global winds

Question 50

In the Southern Hemisphere, currents are deflected to the ______

Accepted Answer

left

Question 51

~ can be _________, ________, or ________; like a conveyor belt

Accepted Answer

cyclical, vertical, circular

Ocean Currents Grade 7

Questions 51

Ocean Currents Grade 7

Questions 51