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.

Mittens help keep your hands warm in winter because:

They are conductors of electrical energy.

A worker for an electrical company is preparing to fix a power line. Why would he put on rubber gloves before working with any power lines?

Rubber is a poor conductor of heat and electricity

Rubber is a poor conductor of heat but a good conductor of electricity

Rubber is a good conductor of heat but a poor conductor of electricity

Rubber is a good conductor of heat and electricity

You have one cup of boiling water and a bathtub full of 70 degree water. Which, if any, has the most heat?

the bathtub full of 70 degree water

they both have the same amount of heat

An ice cube is placed into your hand. Over time, the ice cube begins to melt. Why does the ice cube melt?

The ice cube is gaining heat energy from your hand.

The ice cube is losing heat energy to your hand.

Your hand is gaining heat energy from the ice cube.

A chemical reaction occurs from your sweat that makes the ice cube melt.

Which would be best categorized as heat transfer by convection ?

Noodles rising and falling in a pot of boiling water

wearing a white shirt to stay cool on a summer day

touching a metal spoon that is sitting in a pot of boiling water

using a heating blanket to get warm

What type of heat transfer is used to fry an egg in a pan and how can you tell ?

It is conduction because the egg is touching the pan.

It is conduction because the egg gets cooked.

It is convection because you put oil in a frying pan to cook it in

It is convection because you can feel the heat a few inches away from the pan

Bill and Mary wanted to have a snack after school. They heated some milk in a pot on the stove to make hot chocolate. They also popped some popcorn in the microwave oven. How did Bill and Mary transfer heat energy to make these snacks?

heating milk by conduction; popping popcorn by radiation

heating milk by radiation; popping popcorn by radiation

heating milk by radiation; popping popcorn by convection

heating milk by convection; popping popcorn by conduction

Two jars are placed inside an insulated box. One jar contains ice water and the other contains hot soup. What will happen to the two liquids?

The soup will lose heat and the water will gain heat.

Both the soup and the water will gain heat.

Both the soup and the water will lose heat.

The soup will gain heat and the water will lose heat.

The bulb of a thermometer is placed in your mouth. Which of the following explains why the level of the liquid rises in the thermometer?

The liquid expands when heated.

Hot air rises inside the thermometer.

Heat energy changes into light energy.

Heat can change a solid into a liquid.

What happens to the density of a fluid when it is heated?

It becomes less dense and rises

It becomes less dense and sinks

It becomes more dense and rises

It becomes more dense and sinks

What happens to the density of a fluid when it is cooled?

It becomes more dense and sinks

It becomes less dense and rises

It becomes less dense and sinks

It becomes more dense and rises

Unit 5 Thermal Energy

Authored by Charles Martinez

Physics

6th - 8th Grade

NGSS covered

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40 questions

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MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Conductors are materials that...

Allow heat to pass through

Stop heat from passing through

Allow cold to pass through

Stop cold from passing through

Tags

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

water boiling is an example of ____

conduction

radiation

density

convection

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

heat energy traveling through space is an example of _____

convection

density

radiation

conduction

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

heat always travels from _ to __ objects

hot to cold

cold to hot

cold to cold

hot to hot

Tags

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

This is a lava lamp. When the light bulb heats the wax, the wax rises. When the wax cools, it falls. This cycle of rising/falling is an example of:

Conduction.

Convection.

Radiation.

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

The baby chickens are kept warm from the heat lamps demonstrates this type of heat transfer.

conduction

convection

radiation

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Ironing a shirt is an example of...

condensation

conduction

convection

radiation

Tags

NGSS.MS-PS1-4

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Unit 5 Thermal Energy

Conductors are materials that...

water boiling is an example of ____

heat energy traveling through space is an example of _____

heat always travels from _____ to ______ objects

This is a lava lamp. When the light bulb heats the wax, the wax rises. When the wax cools, it falls. This cycle of rising/falling is an example of:

The baby chickens are kept warm from the heat lamps demonstrates this type of heat transfer.

Ironing a shirt is an example of...

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?

Mittens help keep your hands warm in winter because:

A worker for an electrical company is preparing to fix a power line. Why would he put on rubber gloves before working with any power lines?

Access all questions and much more by creating a free account

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heat always travels from _ to __ objects