Molecules in Gases and Solids

What is the primary difference between a gas and a solid?

• Solids have a definite shape and volume.

• Gases have tightly packed molecules.

• Solids take the shape of their container.

• Gases have more intermolecular forces.

Tags

NGSS.MS-PS1-4

What happens to the movement of gas molecules when thermal energy is added (heat)?

• They slow down and come closer together.

• They stop moving altogether.

• They change into a solid.

• They move faster and spread out.

Tags

NGSS.MS-PS1-4

Which of the following is an example of a gas?

• Ice

• Water

• Air

• Wood

What happens to the motion of molecules in a solid when thermal energy is removed?

• They slow down.

• They change from a solid to a gas.

• They speed up.

• They become liquid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the process where a gas changes directly into a solid without becoming a liquid first?

• Condensation

• Sublimation

• Melting

• Evaporation

Tags

NGSS.MS-PS1-4

Which state of matter takes the shape of its container and has a definite volume?

• Solid

• Gas

• Liquid

• Plasma

What happens to the pressure of a gas when thermal energy is removed (cooled down)?

• It increases.

• It decreases.

• It stays the same.

• It depends on the gas type.

Tags

NGSS.MS-PS1-4

Which of the following is a good example of a solid?

• Air

• Ice cream

• Water vapor

• Oxygen gas

In which state of matter are the molecules the farthest apart?

• Solid

• Liquid

• Gas

• Plasma

What is the process of a liquid changing into a gas called?

• Melting

• Evaporation

• Condensation

• Sublimation

Tags

NGSS.MS-PS1-4