HT.2.a State change

Thermal contraction happens because...

• Particles at higher temperature move with more kinetic energy, so they take up more space.

• Particles at lower temperature don't move with as much kinetic energy, so they take up more space.

• Particles at higher temperature move with less kinetic energy, so they take up less space.

• Particles at lower temperature don't move with as much kinetic energy, so they take up less space.

Which properties do solids have?

• definite shape and volume

• no definite shape and a definite volume

• no definite shape and no definite volume

What properties do liquids have?

• definite shape and volume

• no definite shape and a definite volume

• no definite shape and no definite volume

What properties do gases have?

• definite shape and volume

• no definite shape and a definite volume

• no definite shape and no definite volume

A phase change is a chemical reaction.

• True

• False

Answer explanation

The phase changes, but the substance itself doesn't change! (The melting and vaporization of the wax is not a chemical change, but the "burning" of the wax is a chemical change into smoke)

Which state of matter cannot be compressed? (Select all that apply)

• Solid

• Liquid

• Gas

During the process of sublimation...(select all that apply)

• a solid turns directly into a gas

• a liquid turns to a gas

• a solid turns into a liquid

• a gas turns directly into a solid

The temperature at which a pure solid changes to a liquid is its __________ point.

• condensation

• boiling

• melting

• pressure

The change from solid to liquid is called ________________.

• Solidification

• Condensation

• Evaporation

• Fusion

The change from solid to a gas is called ________________.

• Sublimation
• Freezing
• Evaporation
• Condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4