S8P1bcd Physical and Chemical Properties /Changes and States

S8P1cd When enough heat is added to liquid water, it boils, and bubbles of water vapor rise to the surface and into the air. Which type of change is this and why?

• a chemical change because gas is produced

• a chemical change because heat is produced

• a physical change because the identity fo the substance changes

• a physical change, because the substance changes state

Tags

NGSS.MS-PS1-4

S8P1cd Which of the following is an example of a chemical change?

• water evaporating

• carbon joining with oxygen to form carbon dioxide

• gallium melting just above room temperature

• salt dissolving in water to form a solution

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Salt dissolves in water

• physical Change
• chemical change

Acidity is a ---- property.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

Which of the following statements is NOT true of all different types of matter? (S8P1b)

• They are made of atoms and molecules
• The particles are always in motion
• The particles always move at the same speed
• They are made of particles that are too small to see

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

Identify the phase change.

• Condensation

• Evaporation

• Sublimation

• Ionization

• Melting

Answer explanation

The first model is liquid because it fills the bottom of the container. The second model is a gas because it spreads out. This is EVAPORATION (liquid to gas)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is condensation? And is energy added or removed?

• liquid to gas; energy remvoed

• gas to liquid; energy removed

• liquid to solid; energy removed

• liquid to gas; energy added

• gas to liquid; energy added

Tags

NGSS.MS-PS1-4

What phase change is represented and is energy added or removed?

• condensation; removed

• evaporation; added

• evaporation; removed

• freezing; removed

Tags

NGSS.MS-PS1-4

What happens to particles when they are heated?

• They speed up and spread out
• They slow down and compress
• They stop moving
• They move closer together and speed up

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Match each phase change to the term

• gas to liquid

• ionization

• liquid to gas

• Sublimation
• solid to gas

• Deposition
• gas to plasma

• condensation
• gas to solid

• evaporation

Tags

NGSS.MS-PS1-4