Year 7 Chemistry Topic Revision

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A gas

• has a definite shape but no definite volume
• has a definite volume but no definite shape
• has fast-moving particles

Tags

NGSS.5-PS1-1

NGSS.5-PS1-3

Freezing

• Solid to gas
• Liquid to solid
• Gas to solid
• Liquid to gas

Tags

NGSS.MS-PS1-4

Boiling

• liquid to gas
• gas to solid
• gas to liquid
• solid to liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which state of matter has tightly packed molecules?

• solid
• liquid
• gas

Tags

NGSS.5-PS1-1

What is happening when my ice cream changes from a solid to a liquid?

• freezing
• melting
• burning
• evaporation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which state of matter has a definite shape?

• solid
• liquid
• gas

Particles (molecules) in a ______________________ have more energy than the other states of matter.

• gas
• solid
• liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What term describes a solid changing to a gas?

• Deposition
• Sublimation
• Evaporation
• Freezing

Tags

NGSS.MS-PS1-4

Particles of a liquid

• are tightly packed together and stay in a fixed position.

• have no energy

• decrease in volume with increasing temperature.

• are free to move around one another but still touch.