Convection and Heat Transfer

Heat Transfer

Convection, Conduction, Radiation

Multiple Choice

Heat is a form of _______________.  

• movement
• energy
• melting

Multiple Choice

Without the sun's heat, what would happen to earth?

• aliens would invade

• the earth would explode

• it would be too cold to survive

​Kinetic theory

​The higher the temperature, the faster the particles move.

​
Temperature is the measure of the particle movement.

Multiple Choice

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

• hotter to colder

• colder to hotter

• hotter to hotter

• colder to colder

Multiple Choice

Stir frying vegetables is an example of

• Convection

• Conduction

• Radiation

Multiple Choice

What is a conductor?

• a material that heat moves through easily

• a material that heat does not move through easily

• a material that turns cold when heated

• a tool for measuring temperature

Multiple Choice

Which of these is a better conductor?

Multiple Choice

Cold Pack on Person

• Heat is transferred from the cold pack to the person.

• Heat is transferred from the person to the cold pack

• The cold pack is getting colder. The person is getting warmer.

Multiple Choice

Which best describes the process of convection?

• Convection is the primary way  heat travels  through rays.
• Convection is the primary way heat travels  through metals.
• Convection is the primary way heat travels  through appliances.
• Convection is the primary way heat travels  through liquids and gasses.

Multiple Choice

Near the ceiling of a room the air is warmer. The warm air rises because of ________.

• conduction

• convection

• radiation

Fill in the Blanks

Multiple Choice

When I emit (send out) IR radiation, my body gets:

• Hotter

• Cooler

• Stays the Same

• Humans don't emit radiation

Insulator

How does insulation works?

​Lid on a cup

​Lids reduce heat loss due to convection.

​

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Open Ended

What is a good scientific explanation for this statement:

"Putting a lead on a cup will keep the hot liquid hot longer."

​Cotton balls

​Using cotton balls between cups can reduce convection.

​

Open Ended

What is a good scientific explanation for this statement:

"Putting a cotton balls in between two cups will keep the hot liquid hot longer."

​Aluminium

​Wrapping your thermos in aluminium foil reduces heat transfer by radiation

​​

Open Ended

What is a good scientific explanation for this statement:

"Putting aluminium foil around the cup will keep the hot liquid hot longer."

Multiple Choice

If I want two things to stay different temperatures from each other, I need to:

• Maximize heat Transfer

• Minimize heat transfer

• Make them touch a lot

• Blow on both with a fan

Mixed up questions

​Check your knowledge on heat transfer

Multiple Select

Which of the following are examples of heat transfer through convection?

You may choose more than one.

• Hot air balloon rising

• The second floor of a house is warmer than the first floor

• Boiling water on the stove

• Sitting around a campfire and feeling the heat from the flames

Multiple Select

Which of the following are examples of heat transfer through radiation? You may choose more than one.

• Feeling the heat from a candle

• The water at the top of the pool feels warmer than the deep end

• The sun warming the Earth

• A space heater warming the room

Fill in the Blanks

Fill in the Blanks

Multiple Choice

The heat transferred from the Sun to the Earth by waves is called ________.

• conduction

• radiation

• convection

Fill in the Blanks

Multiple Choice

The baby chickens kept warm by the heat lamps. This is an example of ________.

• conduction

• convection

• radiation

Multiple Choice

A cat is hanging out several feet from a fire in a fireplace. This causes the kitty cat to get warm. The kitty cat is warm because of...

• Convection

• Conduction

• Radiation

• The fur sweater he's wearing!