WorksheetsConvection
Total questions: 15
Worksheet time: 11mins
Name
Class
Date
1.
In an ocean, warm water moves __________ and cold water moves ____________.
a)
Down, Up
b)
Up, Down
2.
What causes wind?
a)
movement of high pressure to low pressure
b)
movement of low pressure to high pressure
3.
During convection, more dense currents _________ and less dense currents _________.
a)
sink, rise
b)
rise, sink
4.
If differences in air pressure produce winds, what can you conclude about temperature and air pressure based on the figure?
a)
As warm air rises, it creates an area of lower pressure, and cooler air flows in as wind
b)
Warm air is denser than cold air is, creating an area of high pressure the produces wind.
c)
Winds flow from areas of low pressure to areas high pressure when temperature is warmer
d)
Air pressure decreases at night because temperature is lower, producing land and sea breezes
5.
At the seashore late in the afternoon on a hot day, a person often feels a strong breeze coming from the ocean because...
a)
the pounding waves generate air currents
b)
warm air over the ocean rushes in to replace the cool air that rises over the land
c)
the heavy, cool air over the ocean rushes in to replace the warm air that rises over the land
d)
there are no clouds to block the wind coming in from the ocean
6.
Heat transfer by convection is caused by differences in what two things:
a)
Thickness and material
b)
Weight and electricity
c)
Temperature and density
7.
Energy for convection on the Earth comes from...
a)
The sun
b)
The moon
c)
Solar winds
d)
The ocean
8.
In convection, COOL air
a)
Rises
b)
Sinks
9.
In convection, WARM air
a)
Rises
b)
Sinks
10.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
11.
Near the ceiling of a room the air is warmer. The warm air rises because of
a)
conduction
b)
convection
c)
radiation
12.
Choose Yes or No.
The surface of the earth unevenly heated.
a)
Yes
b)
No
13.
Choose Yes or No.
Convection cells are created when cold air rises up into the atmosphere and warm air falls to the ground.
a)
Yes
b)
No
14.
Which type of heat transfer occurs when warm air rises up into the atmosphere and cooler air are falls back to Earth's surface?
a)
Convection
b)
Conduction
c)
Radiation
15.
Air moves from high pressure to low pressure.
a)
True
b)
False
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