What is the definition of CONDUCTION?

When heat transfers from objects that are touching.

When heat is transferred from objects like rays of light or electromagnetically.

a hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks.

When heat transfers through the heater or AC in your house.

Considering that convection is driven by differences in temperature, double-pane windows are most likely used to

decrease the rate of heat flow to the outside air.

create a convection current from the outside air to the inside air.

increase the rate of heat flow to the outside air 2

create a convection current from the inside air to the outside air.

Why does food wrapped in aluminum foil keep warm for a long time?

The silver surface of the foil reflects heat in and prevents heat loss by radiation.

Aluminum foil is an insulator and prevents heat loss by conduction.

Aluminum foil forms an air-tight seal and prevents heat loss by convection.

The silver surface of the foil absorbs heat from the surroundings and keeps the food warm.

After cooking an egg in boiling water, you cool the egg by putting it into a bowl of cold water. Which of the following explains the egg's cooling process?

Energy is transferred from the egg to the water.

Temperature is transferred from the egg to the water.

Energy is transferred from the water to the egg.

Cold moves from the water into the egg.

You pick up a can of soda off of the countertop. The countertop underneath the can feels colder than the rest of the counter. Which explanation do you think is the best?

Some heat has been transferred from the counter to the soda.

The cold has been transferred from the soda to the counter.

There is no heat energy left in the counter beneath the can.

The heat beneath the can moves away into other parts of the countertop.

What is the definition of CONDUCTION?

When heat transfers from objects that are touching.

When heat is transferred from objects like rays of light or electromagnetically.

a hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks.

When heat transfers through the heater or AC in your house.

What is the definition of CONVECTION

a hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks.

When heat transfers through waves.

When heat transfers from objects that are touching.

You're holding hands with your best friend. Your friend's hands are REALLY warm and yours are really cold. After a few minutes, this has changed. How might you explain what happened?

The heat energy from your friend's hand transferred to your hand through conduction.

The cold energy from your hand transferred to your friend's hand through conduction.

The cold energy from your hand transferred to your friend's hand through convection.

The heat energy from your friend's hand transferred to your hand through convection.

Two objects at different temperatures are in contact. Which of the following happens to their thermal energy?

Thermal energy passes from the warmer object to the cooler object.

Their thermal energies remain the same.

Thermal energy passes from the cooler object to the warmer object

Thermal energy passes back and forth equally between the two objects.

Marcie played with her friends out in the cold, cloudy weather, wearing her wool hat. After the group had finished building snowmen and having snowball fights, Marcie went back inside to warm up and drink some hot chocolate. When she took her hat off, she realized that it was very warm. What happened?

Conduction between Marcie�s warm body and the hat occurred and the hat remained warm because it is an insulator.

The radiant energy from the sun warmed up her hat and the hat kept that heat from the sun.

�� Her hat was warm because wool fabric is warmer than other fabrics.

The humidity outside made her hat warm.

The solar heat that goes out into space

Which Is an example of convection? Select ALL that apply.

Warm weather and bodies of water

Sc 7 P 11 5

Authored by Charles Martinez

Science

6th - 8th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

20 sec • 1 pt

The sun shines down on this family as the play on the beach.

conduction

convection

radiation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A group of friends gather around a fire to stay warm.

conduction

convection

radiation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Gulf Stream is a current that brings warm ocean water from the south to the north.

conduction

convection

radiation

Tags

NGSS.MS-ESS2-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Walking on the warm sand sand with your bare feet.

conduction

convection

radiation

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Blow drying your wet hair.

conduction

convection

radiation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which direction will the heat flow while this person holds a hot cup of tea?

from the cup to her hand

from her hand to the cup

no heat is transferred

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which direction will the heat flow while this ice cap melts?

there is no heat transfer

from the icecap to the water

from the water to the icecap

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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Sc 7 P 11 5

The sun shines down on this family as the play on the beach.

A group of friends gather around a fire to stay warm.

The Gulf Stream is a current that brings warm ocean water from the south to the north.

Walking on the warm sand sand with your bare feet.

Blow drying your wet hair.

Which direction will the heat flow while this person holds a hot cup of tea?

Which direction will the heat flow while this ice cap melts?

The man goes to take the hot pot off the stove with his bare hands.

The baby chickens are kept warm from the heat lamps.

In some cultures, walking on fire is the ultimate sign of strength.

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