Why does warm air rise and cool air sink?

Warm air is less dense than cooler air.

Warm air is more dense than cooler air.

Warm air weighs less than cooler air.

Warm air weighs more than cooler air.

When would an object left in a room temperature room stop transferring heat?

When it has reached the same temperature as the room temperature air

When it has lost all of its thermal energy

When it has gained all of the air's thermal energy

When it has gained or lost all of it's coldness to the air

How does heat transfer when you hold an ice cube in your hand?

from your warm hand to the cold ice cube

from the cold ice cube to your warm hand

the cold ice cube makes your hand cold

When I cook bacon, it touches the pan. It is cooked because

heat transfers from the pan to the bacon through conduction

heat transfers from the pan to the bacon through convection

heat transfers from the bacon to the pan through conduction

Lisa has a bottle of water. How can she increase the thermal energy of the water?

She can increase the temperature of the water.

She can pour the water into a larger bottle.

She can place the bottle of water in the refrigerator.

She can divide the water between tow identical containers.

Which description defines heat?

total thermal energy of an object or substance

change in the temperature of a substance in degrees Celsius

energy transferred between objects at different temperatures

average kinetic energy of the particles that make up a substance

Kito puts his spoon into a helping of fresh, hot, mashed potatoes as shown in the picture. Which process takes place when the objects come together?

Energy in the form of heat is transferred by conduction from the warmer mashed potatoes to the cooler spoon.

The temperature of the spoon increases, but its thermal energy does not change.

The thermal energy of both the mashed potates and the spoon increase as the energy in the form of heat is transferred between them.

The average temperature of the spoon does not change.

Which example illustrate the transfer of energy through RADIATION?

feeling warmth when you sit in a sunny place.

feeling warm air while standing in front of the blower from a heating system.

feeling the warmth of the bricks around a fireplace by touching them with your hand.

feeling warmth on the soles of your feet when you walk along the beach on a sunny day.

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.

The temperature of a substance increases as___.

the average kinetic energy of its particles increases

the substance's volume increases

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

they both have an equal temperature

one reaches a temperature of zero

When a popsicle melts, the particles in the popsicle _____.

gain thermal energy and speed up

there are no particles in popsicles

lose thermal energy and slow down

Heat and Temperature

Authored by Carmen Hinz

Science

7th Grade

NGSS covered

Used 157+ times

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43 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?

radiation

conduction

convection

insulation

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the definition of CONDUCTION?

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 from objects that are touching.

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

Tags

NGSS.4-PS3-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the definition of CONVECTION

When heat transfers through waves.

When heat transfers from objects that are touching.

warm fluid rises; cool fluid sinks

Heat traveling from the sun

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Warm air is __________ dense than cold air and rises creating convection currents.

less

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the BEST example of a conductor?

A wooden block

A ceramic mug

A glass cup

A metal bowl

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An insulator . . .

Allows a lot of heat to escape

Makes the temperature of an object rise

Moves heat from one place to another

Traps heat inside an object

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

True or False: A thermal conductor transfers heat well between two objects, and the heat does not stay in one place.

True

False

Tags

NGSS.MS-PS1-4

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Heat and Temperature

The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?

What is the definition of CONDUCTION?

What is the definition of CONVECTION

Warm air is __________ dense than cold air and rises creating convection currents.

What is the BEST example of a conductor?

An insulator . . .

True or False: A thermal conductor transfers heat well between two objects, and the heat does not stay in one place.

A jacket is a good example of an . . .

What is the BEST example of a conductor?

The faster an object moves, the ________ kinetic energy it has.

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