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Convection Currents

Total questions: 40

Worksheet time: 24mins

Name
Class
Date
1.
The main reason that we have currents in the ocean and air is
a)
the sun heats the air and ocean evenly everywhere
b)
the heat inside the earth heats the ocean and the ocean heats the air
c)
the sun cannot heat both the air and water, so one must heat the other
d)
the sun heats air and water more at the equator because it receives more direct sunlight
2.
Energy for convection on the Earth comes from...
a)
The sun
b)
The moon
c)
Solar winds
d)
The ocean
3.

What is the original source of the most of the energy that people use?

a)

By radiation from the sun.

b)

By convection from the sun.

c)

By radiation from the Earth's core.

d)

Conduction from Earth's core.

4.

Convection currents occur in water creating ________.

a)

ocean currents

b)

winds

5.

What is an example of a convection current?

a)

Touching a hot spoon that was in a soup bowl.

b)

Feeling the suns rays on a nice summer day.

c)

Touching an iron skillet after cooking and feeling the heat.

d)

Movement of gas in a hot air balloon.

6.

Warm air molecules do which of the following?

(Choose 2 answers.)

a)

Sink

b)

Rise

c)

Spread apart (expands)

d)

Get closer together.

7.

What happens to air when it is cold?

a)

Air expands and rises

b)

Air expands and sinks

c)

Air contracts and rises

d)

Air contracts and sinks

8.

True or False. Convection currents (warm and cool molecules moving in a cycle) can occur in both air and water.

a)

True

b)

False

9.
Warm air rises and the cool air sinks demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
d)
Insolation 
10.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
11.

When do particles move faster?

a)

In hot water

b)

In cold water

12.

When particles are heated they begin to ____.

a)

move faster

b)

mover slower

c)

move up

d)

jump out of the pot

13.
Near the ceiling of a room the air is warmer.  The warm air rises because of
a)
conduction
b)
convection
c)
radiation
14.
The cycle that powers the ocean currents, weather, and tectonic plates it called
a)
conduction current
b)
radiation
c)
condition current
d)
convection current
15.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
16.

What is wind?

a)

convection currents cause wind and storms

b)

the sun heats the Earth unevenly causing convection currents in the air and ocean.

c)

warm air rises off the mountainside creating wind

d)

the movement of air caused by differences in air pressure or temperature

17.

How are convection currents connected to weather?

a)

weather is formed from the coriolis effect

b)

the cold water mixes with the warm water to create weather

c)

Convection currents create wind. Wind blows clouds that carry precipitation which change the weather.

d)

convection currents create climate zones

18.

what is a sea breeze?

a)

warm air from the sky warming the ocean

b)

cold air from the land warming up the ocean

c)

The flow of cooler air from over an ocean or lake toward land

d)

warm air from the land cooling the ocean

19.

Winds flow from

a)

Higher to lower pressure

b)

Lower to higher pressure

20.

What is a sea breeze?

a)

warm air from the sky warming the ocean

b)

cold air from the land warming up the ocean

c)

The flow of cooler air from over an ocean or lake towards the warmer air over land

d)

warm air from the land cooling the ocean

21.
The Gulf Stream is a current that brings warm ocean water from the south to the north. What type of heat transfer is this?
a)
conduction
b)
convection
c)
radiation
d)
Insolation 
22.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
23.
The way the heat is moving from the hot coffee is called...
a)
convection
b)
radiation
c)
insulation
d)
conduction
24.

Why does ice float?

a)

Due to convection currents

b)

It is more dense than water.

c)

It is less dense than water.

25.

What type of breeze is this?

a)

Land Breeze

b)

Sea Breeze

c)

Mountain Breeze

d)

Valley Breeze

26.

What type of breeze is this?

a)

Land Breeze

b)

Sea Breeze

c)

Mountain Breeze

d)

Valley Breeze

27.

Cool/cold air that sinks towards the Earth's surface creates a ______________ area?

a)

high pressure

b)

low pressure

c)

no pressure

d)

pressure free

28.

Warm air that rises above the Earth's surface creates a ______________ area?

a)

high pressure

b)

low pressure

c)

no pressure

d)

sinking

29.
Why do land breezes occur at night?
a)
Land cools off slower than water, so the air above water is cooler.
b)
Water cools off faster than land, so the air above land is warmer.
c)
Land heats up slower than water, so the air stays cooler during the day.
d)
Water cools off slower than land, so the air above water is warmer.
30.
How does air travel?
a)
they don't travel
b)
hot to cold
c)
cold to hot
d)
All of the above
31.

Walking on hot sand with your bare feet shows this type of heat transfer.

a)

conduction

b)

convection

c)

radiation

32.
A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student’s skin by this contact is by the process of—
a)
convection
b)
conduction
c)
vaporization
d)
radiation
33.

Ironing a shirt is an example of:

a)

condensation

b)

evaporation

c)

conduction

d)

convection

34.

You and your friends are gathered around a campfire to keep warm. How is heat being transferred to you?

a)

conduction

b)

convection

c)

radiation

35.

What kind of heat transfer is occurring when the sun warms the sand?

a)

Conduction

b)

Convection

c)

Radiation

d)

All of them

36.

Which type of heat transfer is happening inside the hot air balloon?

a)

convection

b)

conduction

c)

radiation

d)

hot air balloon

37.

Lava in a lava lamp rising and falling as its heated and cools is an example of:

a)

conduction

b)

convection

c)

radiation

38.

Which type of heat transfer is happening where the pot is sitting on the red hot glowing metal rack?

a)

conduction

b)

convection

c)

radiation

39.

Warming your hands near a campfire is an example of:

a)

convection

b)

conduction

c)

radiation

40.

Which type of heat transfer is happening INSIDE the pot on the stove?

a)

convection

b)

conduction

c)

radiation

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