8U3L5 What is Heat?

8U3L5 What is Heat?

Let's see what you remember about heat transfer...

Multiple Choice

The energy that flows from something warm to something cool is

• air

• Thermal energy

• vapor

• Light energy

Multiple Choice

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 Select

Mark two examples of radiation energy.

• boiling water

• the microwave

• the sun

• touching a warm piece of metal

Multiple Choice

___________ is energy that is sent out in waves.

• convection

• radiation

• conduction

• heat

Multiple Select

Mark two examples of conduction.

• putting your warm face in the fresh pillow

• a bird warming its eggs in a nest

• hot air from the heater moving across the room

• light from the sun warming the sidewalk

Multiple Choice

Is energy that flows from something warm to something cool

• air

• Thermal energy

• vapor

• Light energy

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

John put a heat pack on his cold feet. What will most likely be the result?

• The cold from John’s feet will be radiated into the heat pack.

• The warmth of the heat pack will be radiated onto John’s feet.

• The cold from John’s feet will be conducted into the heat pack.

• The warmth of the heat pack will be conducted onto John’s feet.

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.

What is Heat?

And why does it transfer?

Open Ended

If you were to zoom in to some frozen water molecules as you heat them up, how do you think they change as they get warmer?

All matter is made of particles (atoms or molecules) tha are always moving.

The more heat energy added to a substance, the more the particles move.

The more they move, the farther apart they get! This is why we have phase changes.

Multiple Choice

All matter is made of _____ that are constanly moving.

• insulators
• particles
• convection
• pieces of plastic

Multiple Choice

Molecules are always ____________________ (with the exception of absolute zero).

• in motion

• frozen

HEAT (thermal energy) is the energy that an object has because of the motion of its particles

more heat = more motion

A thermometer measures the temperature, or how fast the particles are moving.

Faster movement = higher temperature

Multiple Choice

Measures how fast or how slow molecules are moving

• Thermal Energy

• Temperature

• Heat

• All of them

Heat ALWAYS transfers from hot to cold.

Heat transfers from one object in contact with another until they reach EQUILIBRIUM.

Equilibrium is when the temperatures are equal!

Multiple Choice

In nature, heat always flows from a:

• cold object to a warm object.

• small object to a big object.

• warm object to a cold object.

• large object to a small object.

Multiple Choice

heat always travels from _____ to ______ objects

• hot to cold

• cold to hot

• cold to cold

• hot to hot

Heat travels easily through CONDUCTORS like:

• Silver

• Gold

• Copper

• Any metals...

Heat does not like to travel through INSULATORS like:

• Plastic

• Wood

• Paper

• Vinyl

• Fabrics

Multiple Choice

These are examples of

• Insulators

• Conductors

Multiple Choice

Mittens help keep your hands warm in winter because

• they are colorful

• they are fuzzy

• they are conductors

• they are insulators

Multiple Choice

What is a conductor?

• a material that slows the transfer of heat
• a material that transfers heat easily
• a material that is fluffy
• a material that is temperature controlled

Multiple Choice

A jacket is a good example of an . . .

• Insulator
• Investigator
• Conductor
• Interrogator

Multiple Choice

______________ are materials that RESIST the flow of heat or thermal energy.

• Conductors

• Insulators

Multiple Choice

What is the BEST example of a conductor of thermal energy?

• A wooden block

• A wool oven mitt

• A plastic mug

• A metal pan

Multiple Choice

___________________ are materials that ALLOW heat and electricity to move easily through them.

• Conductors

• Insulators

The End!