Heat, Temperature, & Phase Change

How do the molecules in a cold coffee compare to the molecules of a hot coffee?

• The molecules in the hot coffee have less kinetic energy and are moving slower.

• The molecules in hot and cold coffee behave the same.

• The molecules of the cold coffee are closer together than a hot coffee.

• The molecules in the hot coffee are closer together and have more attractive forces.

Tags

NGSS.MS-PS1-4

When laying wood flooring the carpenters need to leave a space near the wall because wood expands and contracts with changing temperatures. What happens to the spaces in the winter when it is cold and why?

• The spaces between the boards increase because the wood contracts in the cold.

• The spaces between the boards decrease because the wood contracts in the cold.

• The spaces between the boards stay the same because they are not affected by cold temperatures.

• The spaces between the boards decrease because the wood expands in the cold.

Tags

NGSS.MS-PS1-4

When making ice cream, milk freezes and becomes a solid. What happens to the milk molecules as it freezes?

• The milk molecules move faster as the temperature decreases.

• The speed of the molecules does not change.

• The average speed of the molecules decreases as the temperature decreases.

• The milk molecules move slower and slower until they stop moving at all.

Why do gas molecules leave a container without a cover and liquids do not?

• The liquid molecules are heavy and larger and stay in the container.

• The gas particles are moving slower and are attracted to one another so they can leave the container.

• The gas particles are moving so fast that they do not stay together because they have low attractive forces.

• The gas molecules are smaller and can leave the container.

Tags

NGSS.MS-PS1-4

In which state of matter do molecules have the MOST kinetic energy?

• Solid

• Liquid

• Gas

Tags

NGSS.MS-PS3-4

Identify the type of phase change from GAS to SOLID

• Boiling

• Sublimation

• Condensation

• Deposition

Tags

NGSS.MS-PS1-4

Identify the type of phase change from SOLID to GAS

• Freezing

• Condensation

• Sublimation

• Deposition

Tags

NGSS.MS-PS1-4

Identify the type of phase change from GAS to LIQUID

• Condensing

• Boiling

• Evaporating

• Freezing

Tags

NGSS.MS-PS1-4

Identify the type of phase change from LIQUID to GAS

• Condensation

• Freezing

• Evaporation/Boiling

• Melting

Tags

NGSS.MS-PS1-4

Identify the type of phase change from SOLID to LIQUID

• Freezing

• Boiling

• Melting

• Condensing

Tags

NGSS.MS-PS1-4