Thermal Energy

Multiple Choice

All matter is made up of atoms that are constantly moving

• True

• False

Thermal energy

Thermal Energy → sum of the kinetic and potential energy of all the particles in an object; thermal energy of an object increases as temperature increases

Heat → thermal energy that flows from something at a higher temperature to something at a lower temperature

Multiple Choice

Hot things have ____________ thermal energy than cold things

• more

• less

• same

• potato

Multiple Choice

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

• higher; particles do not move

Multiple Choice

As temperature increases, molecules _____________

• move slower

• move the same

• move faster

• stop moving

Multiple Choice

Why do you want to live in a home with good insulation during the cold winter months?

• The insulation will keep you cool during winter.
• If there is good insulation, the thermal energy will not be able to move easily from inside the warm home to the cool areas outside the building.
• If there is not good insulation, the air inside the home will become too hot.
• A house with good insulation will keep the warm air in the attic.

Multiple Choice

When holding a cup of ice water, your warm hand becomes cold. How does the heat transfer?

• From the cold cup to your hand
• From the cold cup to the warm air
• From the ice to your hand
• From your warm hand to the cold cup.

Multiple Choice

Conductors are materials that...

• Allow heat to pass through
• Stop heat from passing through
• Allow cold to pass through
• Stop cold from passing through

Multiple Choice

Heat can be transferred from one material to another?

• False
• True

Multiple Choice

Heat will always flow from

• from warmer object to a cooler object
• inside and object to outside an object
• from a cooler object to a warmer object
• up to down

Multiple Choice

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

• high to low
• low to high
• high to high
• It can travel high to low and low to high. 

Multiple Choice

The energy of moving particles is called _____.

• sound energy

• heat or thermal energy

• light energy

• mechanical energy

Multiple Choice

When particles are heated they begin to ____.

• move faster

• mover slower

• move up

• jump out of the pot

Multiple Choice

When thermal energy is applied to an ice cube, it _____.

• freezes

• stays the same

• tastes better

• melts

Thermal energy

• Conduction → Transfer of thermal energy by collisions between particles in matter.

• Radiation → Transfer of energy by electromagnetic waves. Occurs in gases only.

• Convection → Transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from place to place. Occurs in liquids & gases.

Multiple Choice

This type of thermal energy transfer can take place in gases only.

• conduction

• convection

• radiation

Multiple Choice

This type of thermal energy transfer can take place in fluids (liquids & gases). Rising of warmer fluid and sinking of cooler fluid forms a current.

• conduction

• radiation

• convection

Multiple Choice

This type of thermal energy transfer can take place in solids, liquids, & gases when two objects are touching.

• conduction

• radiation

• convection

Multiple Choice

The foam cup and cardboard sleeve act as ______ for the hot coffee.

• insulators

• conductors

• transfers

• radiation

Multiple Choice

Which of the following are sources of radiation?

• sun, lightbulbs and heat over a fire

• sun, lightbulbs and heat next to a fire

• boiling water and evaporation

• sun and insulators

Multiple Choice

When heat is transfered by direct contact , the thermal energy transfer is

• conduction

• convection

• radiation

• insulation

Multiple Choice

The metal handle is hot because of ____.

• conduction

• convection

• radiation

• precipitation

Multiple Choice

A hot air balloon rises because the air is heated by ___.

• convection

• conduction

• radiation

• precipitation

Multiple Choice

This worker is installing____ in a home.

• insulation

• condensation

• conductors

• thermostat

Multiple Choice

A cook will use an oven mitt to pick up a hot pan because cloth is a(n) ________ and keeps the heat from their hand.

• insulator

• conductor

• thermostat

• furnace

Multiple Choice

Clothing that keeps heat in is called ____ clothing.

• thermal

• absorbent

• waterproof

• reflective

Multiple Choice

Heat that comes out to the side of a fire is an example of _________.

• radiation

• conduction

• convection

• transpiration

Multiple Choice

Why do we cook food over a fire?

• Heat rises due to convection.

• Heat rises due to conduction.

• Heat makes air molecules expand and fall.

• Heat makes water molecules expand and rise.

Multiple Choice

What is true about the transfer of heat from hot tea to the metal spoon?

• Heat goes from the metal to the tea by radiation.

• Heat goes from the hot tea to the spoon by conduction.

• Heat goes from the hot tea to the metal spoon through radiation.

• Hot air rises and warms the air, then the spoon gets hot from the hot air.