7th Grade Unit 1 Review

What happens to the molecules in a substance when the temperature of the substance increases?

• they spread far apart in all directions

• they get closer together

• they start to break apart, but are pulled down due to gravity

• they freeze together

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When the temperature of a substance increases, the molecules move faster and spread apart in all directions. This leads to a(n) ________ in the volume of the substance.

• decrease

• increase

Tags

NGSS.MS-PS1-4

When thermal energy is added to water, the molecules break apart and spread out, forming _____.

• a liquid

• ice

• a gas

• a non-Newtonian fluid

Tags

NGSS.MS-PS1-4

As kinetic energy increases, temperature _____.

• decreases

• increases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

_______ is the transfer of heat through direct touch.

• convection

• conduction

• radiation

_______ is the transfer of heat through a liquid or a gas.

• convection

• conduction

• radiation

Tags

NGSS.MS-ESS2-6

_____ is the transfer of heat through electromagnetic waves.

• convection

• conduction

• radiation

Tags

NGSS.MS-PS4-2

As kinetic energy decreases, temperature ______________.

• increases

• decreases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

To increase the distance between molecules, _________ the substance.

• add heat to

• take heat away from

Tags

NGSS.MS-PS1-4

Total thermal energy depends on temperature of the substance, how many atoms in the system, and the conductivity of the material.

• true

• false

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3