Thermal Energy and States of Matter

The temperature at which a substance melts is its _______.

• melting point

• freezing point

• evaporation

• condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

True or false:

When a solid changes state to a liquid, it is said to freeze.

• True

• False

Tags

NGSS.MS-PS1-4

At what temperature in Celsius does water molecule freeze?

• 100

• -10

• 0

• -100

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

At what temperature in Celsius does water molecule melt?

• 100

• 0

• -10

• 10

Tags

NGSS.MS-PS1-4

The particles that make up a substance in its liquid state have _____ kinetic energy than those of the same substance in its solid state.

• more

• less

• the same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Explain why this statement is false:

All substance melts and freezes at 0 degree Celsius.

• Because substances do not melt and freeze in the same temperature.

• Because different substances have their own melting point.

• Because not all substances melt.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

For a solid to melt, energy must be __________ the system.

• added to

• removed from

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

For a liquid to freeze, energy must be _________ the system.

• added to

• removed from

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to the movement of particles when the energy is added?

• Particles get destroyed

• Particles move slower

• Particles move faster

• Particles convert to energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If you leave a cup of water in your room for a week, the liquid eventually turns into gas. What process has occurred?

• Evaporation

• Vaporization

• Condensation

• Boiling

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4