Thermal Energy & Heat Review

Front

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

Back

Heat

Answer explanation

The flow of thermal energy from a warmer object to a cooler object is defined as heat. Temperature measures how hot or cold an object is, while molecular and momentum do not pertain to thermal energy transfer.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Front

Which of these is a good conductor of thermal energy?

Wood

,

Paper

,

Silver

,

Air

Back

Silver

Answer explanation

Silver is a good conductor of thermal energy due to its high electrical conductivity and low thermal resistance. In contrast, wood, paper, and air are poor conductors, making silver the correct choice.

Tags

NGSS.MS-PS3-3

Front

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

Back

Temperature

Answer explanation

Temperature is a measure of the average kinetic energy of the particles in an object. It reflects how fast the particles are moving, which directly relates to their kinetic energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

Because a bath tub full of water has more molecules, it has more __________ than a teacup at the same temperature.

Back

Thermal energy

Answer explanation

A bath tub has more molecules than a teacup, leading to greater thermal energy. Thermal energy depends on the number of molecules and their motion, not just temperature, making it the correct choice.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

The handle of a spoon in a bowl of soup becomes warm due to heat transfer by the process of:
- Conduction
- Convection
- Radiation
- Insulation

Back

Conduction

Answer explanation

The handle of the spoon warms up due to conduction, which is the transfer of heat through direct contact. The heat from the soup transfers to the spoon's handle, making it warm.

Front

What type of heat transfer is happening at "A"? Options: conduction, convection, radiation.

Back

conduction

Answer explanation

At point 'A', heat transfer occurs through conduction, which is the process of heat transfer through direct contact between materials. This is distinct from convection and radiation, which involve fluid movement and electromagnetic waves, respectively.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Front

What type of heat transfer is happening at "B"? Options: conduction, convection, radiation

Back

convection

Answer explanation

At 'B', convection is occurring as it involves the transfer of heat through the movement of fluids (liquids or gases). This process differs from conduction, which requires direct contact, and radiation, which involves energy transfer through electromagnetic waves.

Front

What type of heat transfer is happening at "C"? Options: conduction, convection, radiation

Back

radiation

Answer explanation

At point 'C', heat transfer occurs through radiation, which involves the transfer of energy in the form of electromagnetic waves. Unlike conduction and convection, radiation does not require a medium.

Front

Heat will always transfer from the ___________ object to the ________ object.

Back

The hottest object to the coolest object.

Answer explanation

Heat transfer occurs from the hottest object to the coolest object due to the second law of thermodynamics, which states that heat flows naturally from higher to lower temperatures until thermal equilibrium is reached.

Tags

NGSS.MS-PS1-4

Front

How will the heat transfer between a bowl of frozen ice cream and whip cream from the refrigerator?

Back

It will travel from the warmer whip cream to the frozen ice cream.

Answer explanation

Heat transfer occurs from the warmer whip cream to the frozen ice cream, as heat moves from areas of higher temperature to lower temperature until thermal equilibrium is reached.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4