Front

What happens to the energy of water molecules when the temperature of the water increases?

Back

The energy of the water molecules increases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What happens to the energy of the molecules in a hockey puck when its temperature decreases?

Back

The energy of the molecules in the hockey puck decreases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Front

How do the temperatures of two chocolate bars compare before they touch, and what happens after they touch?

Back

Before they touch, the top bar is hotter than the bottom bar. After touching, the top bar transfers kinetic energy to the cooler bottom bar until both reach the same temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What happens to the temperatures of two cards before and after they touch?

Back

Before they touch, the top card is hotter than the bottom card. After touching, the top card transfers kinetic energy to the cooler bottom card until both reach the same temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Front

Why will the larger top plastic piece be cooler than the smaller top plastic piece after they have been touching?

Back

The larger top plastic piece will be cooler because the energy that transferred to it was spread out over more molecules.

Tags

NGSS.MS-PS1-4

Front

Define thermal energy.

Back

Thermal energy is the total kinetic energy of the particles in a substance, related to its temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion, which in the context of molecules, relates to their movement and temperature.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Front

Explain the concept of heat transfer.

Back

Heat transfer is the movement of thermal energy from a hotter object to a cooler one until thermal equilibrium is reached.

Tags

NGSS.MS-PS1-4

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact no longer transfer heat to each other, meaning they are at the same temperature.

Tags

NGSS.MS-PS3-4

Front

What role do molecules play in thermal energy?

Back

Molecules are the building blocks of matter, and their motion and energy levels determine the thermal energy of a substance.

Tags

NGSS.MS-PS1-4