Hot objects begin to cool as-

thermal energy in the object is transferred to the surrounding air.

cooler air is transferred to the hot object.

atoms in the object react with the oxygen in the air.

thermal energy in the object cancels out energy in the air

Which sentence explains why a cold metal spoon placed in a pot of boiling water becomes hot?

Thermal energy is transferred from the water to the spoon.

Thermal energy is transferred from the spoon to the water.

Thermal energy in the water is transformed into kinetic energy in the spoon.

Thermal energy in the spoon is transformed into kinetic energy in the water.

Which particles are moving fastest?

Particles in water from the sink.

If a door was left open between the bedroom (74 degrees) and the living room (68 degrees), what would likely happen to the temperatures after several hours?

the bedroom temp. would lower and the living room temp. would rise

After holding an ice pack against his skin for 20 minutes, the man notices the ice pack is melting. Why is this happening?

conduction - body heat transferred to the cold ice pack

radiation - the ice pack is now all melted

convection - the water in the ice pack flowed in a circle pattern

conduction - heat came from the bigger object to the smaller

If you were going to use this pan to cook, what do you notice could be a problem?

the handles are all metal and will be HOT

it is made of metal, a good conductor

the sides are all metal and will be HOT

there is no food in the pan to cook

Conduction can only occur between two objects when –

both objects are in physical contact with each other.

one object is less dense than the other.

one of the objects is made of a metal.

both objects are exactly the same temperature.

In the situation illustrated, how will heat energy move? Heat energy will be transferred from –

the hot plate to the water by conduction.

the water to the hot plate by convection.

the water to the hot plate by conduction.

the hot plate to the water by convection.

An example of a situation in which an egg is receiving thermal energy through convection -

The egg is hard boiled in a pot of water.

The egg is kept warm by its mother in the nest.

An egg cracked on a hot sidewalk starts to cook.

A metal pan on the stove fries the egg.

Which of the following is an example of conduction?

Heat moving from a clothes iron to a shirt.

Heat rising from the coils of a stove.

Thermal energy transfer by conduction is accomplished when heat moves from a warmer object to a cooler one by -

coming in direct physical contact with it.

being carried in a fluid, like air or water.

On a cold rainy day a baby is touching a cold window. It feels so cold. Which way is the heat moving moving?

Heat is moving from the hand to the window.

Cold is moving from the window to the hand.

Heat transfers from an area of ____temperature to an area of ___ temperature.

It can travel high to low and low to high.

A cup of tea with a temperature of 80 degrees Celsius is placed on a table in a 20 degree Celsius room. What happens to the thermal energy and the molecular motion of the tea when it is left on the table?

The thermal energy decreases and molecules move more slowly.

The thermal energy increases and the molecules move faster.

The thermal energy increases and the molecules move more slowly.

What is the intended purpose of a camp fire?

electrical and mechanical energy

Cold things often have a _________ kinetic energy because_______

lower; particles are moving around less

lower; particles are moving around more

higher; particles are moving around the same

For objects that have the SAME mass, which object will have a HIGHER thermal energy?

the object with the higher temperature

the object with the lower temperature

the objects will have the same temperature

the objects have no temperature

Heat Transfer Matter Weather Ecosystems

Authored by Charles Martinez

Science

6th - 8th Grade

NGSS covered

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55 questions

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The total energy of all the particles in a substance is called

temperature

thermal energy

degrees

mass

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The movement of thermal energy from a warmer object to a cooler object is called

heat

temperatur

motion

momentum

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Heat transfer occurs

in many directions

both from warm objects to colder ones and from cold objects to warmer ones

only from warm objects to colder ones

only from cold objects to warmer ones

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

A measure of the average kinetic energy of the individual particles in an object is called

thermal energy

conduction

convection

temperature

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What happens to particles as they heat up?

They slow down

Nothing

They don't move

They speed up

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What happens to particles as they cool down?

They slow down

Nothing

They don't move

They speed up

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

As you touch a hot stove the heat transfers -

from your hand to the stove

from the stove to your hand

It doesn't transfer

Tags

NGSS.MS-PS3-3

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