Heat Transfer: Conduction, Convection

Conduction, Convection, and Radiation

Multiple Choice

True or False. Energy cannot be created or destroyed; it can only be transformed.

• True

• False

Drag and Drop

Heat ​

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from an area of​

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air to an area of ​

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air.

Drag these tiles and drop them in the correct blank above

transfers

warm

cold

Multiple Choice

What is Convection?

• Direct contact?

• Mass movement of molecules

• Electromagnetic Waves

• None of the above

Multiple Choice

What is Conduction?

• Direct contact

• Mass movement of molecules

• Electromagnetic Waves

• None of the above

Multiple Choice

What is Radiation?

• Direct Contact

• Mass moment of molecules

• Electromagnetic waves

• None of the above

Multiple Choice

What is heat transfer?

• The movement of heat from one object to another

• The creation of heat energy

• The loss of heat energy

• The transformation of heat from one form to another

Multiple Choice

In which direction does heat move?

• From warmer to cooler

• From cooler to warmer

• From north to south

• From east to west

Multiple Choice

When energy increases, the speed of molecules ______.

• Increases

• Decreases

• Stay the same

Multiple Choice

When molecules are heated, what happens to them?

• They speed up, becomes less dense, and rise

• They speed up, become more dense, and rise

• They slow down, become less dense, and sink

• They slow down, become more dense, and sink

Multiple Choice

What happens to warmed molecules after they rise to the top?

• They cool down, become more dense, and sink

• They cool down, become more dense, and rise

• They warm up, become more dense, and rise

• They warm up, become less dense, and sink

Multiple Choice

What is conduction?

• The transfer of heat through direct contact

• The transfer of heat through the rise of warm fluids and sinking of cool fluids

• The transfer of heat through electromagnetic waves

• The transfer of heat through fluids

Multiple Choice

Objects that easily transfer heat (metals are good at this)

• Conductors

• Insulators

• Fluids

• Molecules

Multiple Choice

Objects that do not allow heat to transfer easily through them (wood, plastic, fabrics)

• Conductors

• Insulators

• Molecules

• Fluids

Multiple Select

Which example(s) describes conduction?

• An egg frying in a pan

• Feeling heat from the sun

• Jumping in a lake to cool off

• Cooking a hot dog over a fire

Multiple Choice

Which molecules have more energy?

• Cold

• Hot

Multiple Choice

What is convection?

• Transfer of heat in a fluid through currents

• Transfer of heat through direct contact

• Transfer of heat through electromagnetic waves

Multiple Select

What two states of matter are considered fluids?

• Solids

• Liquids

• Gases

• Plasma

Multiple Choice

As fluids are ______, they become _____ dense and rise.

• Heated; more

• Heated; less

• Cooled; more

• Cooled; less

Multiple Choice

The best place to cook a hot dog is above the fire. Why?

• Because heat rises

• Because heat sinks

• Because there are more molecules above it

• Because there is more room

Fill in the Blanks

Conduction or Convection?

Fill in the Blanks

Conduction or Convection?

Multiple Choice

Lava lamps work because of what type of heat transfer?

• Conduction

• Convection

Draw

Draw (colored) arrows representing the tranfer of heat through convection in a pot of boiling water.

Multiple Choice

True or False: Heat always transfers from the cool object to the warmer object.

• True

• False

Multiple Select

Identify the example(s) of convection.

• Floating in a hot air balloon

• Lava lamps

• Heating a marshmallow over a fire

• Cooking a burger on the grill

Match

Match

radiation

radiation AND conduction

convection

• radiation

• radiation AND conduction

• convection

Multiple Choice

Which will most likely occur when raw egg is placed on black pavement on a hot, summer day?

• The pavement will conduct the heat and cook the egg.
• The egg will reflect the heat and make the pavement hotter underneath.
• The egg will absorb the heat  and leave the pavement hotter underneath.
• The pavement will absorb the heat from the egg, and the egg will stay raw.

Multiple Choice

Scoopy McScooperson places a hot spoon into a container of ice cream. How does this help him scoop  out the ice cream? 

• The coolness from the ice cream is conducted to the spoon making it easier to scoop out.

• The coolness from the ice cream is radiated to the spoon making it easier to scoop out.

• The warmth of the spoon is conducted to the ice cream  making it easier to scoop out.

• The warmth of the spoon is radiated  to the ice cream making it easier to scoop out.

Multiple Choice

Which describes what can happen as a result of radiation?

•  A piece of wood burns in a fire.
• A shirt is hot after having been  ironed.
• A can of soup is heated in a pot on a stove.
• A car’s inside temperature rises  to over 100 degrees on a sunny day.

Multiple Choice

Which is an example of heat being transferred by conduction?

• a furnace heating the air in a school
• an ice cube melting in a person’s hand
• a pot of water on a stove boiling
• the sun heating water in a swimming pool

Multiple Select

Select all that apply. Which of the following are examples of radiation?

• microwave

• Sunlight

• Fire

• touching a piece of hot metal

Multiple Choice

How does heat energy reach the Earth from the Sun

• Convection

• Radiation

• Conduction

Multiple Select

Select all that apply: Which of these are examples of conduction?

• touching hot metal

• warming a spoon makes it easier to dip

• an egg cooks on hot pavement

• sunlight feels warm

Match

Match these

• Heat transfers through waves/rays

• Liquid (or air) heats up, speeds up and spreads out, becoming less dense. As it rises, it cools, slows, and comes back together. This increases density, making it sink again.

• Heat transfers from objects that are touching.

Radiation

Convection

Conduction

• Radiation

• Convection

• Conduction

Multiple Select

Select 4 answers. Which of the following is an example of Convection?

• Convection currents

• The energy driving the water cycle

• lava lamp ^v

• water boiling

• hitting hot metal