Phase Changes & Physical/Chemical Properties

Which characteristic of a substance is considered a chemical property?

• its boiling point

• its reactivity

• its density

• its conductivity

Salt dissolving into water is an example of a

• Physical change

• Chemical change

• Physical property

• Chemical property

Tags

NGSS.MS-PS1-2

Water freezing is an example of a change of

• Vapor

• Physical property

• State (phase) change

• Chemical property

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Magnetism is an example of

• Physical property

• Physical change

• Chemical property

• Chemical change

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Sublimation (deposition) is ...

• formation of a solid from a solution (forming crystals)

• a change of state from a liquid to a solid

• a change of state from a solid directly into a gas (solid into a gas)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Endothermic

• energy is released (so it feels “hot” to your hand)

• energy is absorbed (so it feel “cool” to your hand)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-6

NGSS.MS-PS3-4

Exothermic

• energy is released (so it feels “hot” to your hand)

• energy is absorbed (so it feel “cool” to your hand)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When thermal energy is added to liquids they -

• Melt and change to a solid

• Condense and change to a gas

• Vaporize and change to a gas

• Freeze and change to a solid

Tags

NGSS.MS-PS1-4

When thermal energy is added to solids they -

• Melt and change to a liquid

• Condense and change to a gas

• Vaporize and change to a gas

• Freeze and change to a liquid

Tags

NGSS.MS-PS1-4

What is the difference between a chemical property and a physical property?

• A chemical property does not require a test and may change the identity of the substance whereas a physical property always changes the identity of the substance.

• A chemical property requires a test and may change the identity of the substance whereas a physical property can be observed or measured without changing the identity of the substance.

Tags

NGSS.MS-PS1-2