Heat & Matter

What happens to molecules within a substance when thermal energy is added?

• They begin to move around faster, and the substance can possibly change state, for example from liquid to gas

• They begin to slow down, and the substance can possibly change state, for example from liquid to solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is heat?

• How hot something is.

• The transfer of thermal energy from one object to another.

• A high temperature.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

If you remove thermal energy from a liquid substance which of the following would not happen?

• the temperature of the liquid would decrease

• the molecules of the substance would begin to move faster

• the molecules in the sample would lose kinetic energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

How are kinetic energy and temperature related?

• When kinetic energy increase so does temperature!

• When kinetic energy increases, temperature decreases!

• The two concepts are not linked!

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Thermal energy is?

• The TOTAL kinetic energy of all of the atoms within an object or material.

• The AVERAGE kinetic energy of all of the atoms within an object or material.

Tags

NGSS.MS-PS3-3

Temperature is?

• The TOTAL kinetic energy of all of the atoms within an object or material.

• The AVERAGE kinetic energy of all of the atoms within an object or material.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Particles within a solid move faster (have more kinetic energy) than particles within a liquid.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-4

Particles within a gas move faster (have more kinetic energy) than particles within a liquid, or solid.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-4

Which of the following has more thermal energy?

A hot cup of water, or a giant glacier the size of a football field?

• Glacier

• Hot cup of water

Tags

NGSS.MS-PS3-4

In which direction does thermal energy (heat) always flow?

• From cold to hot

• From hot to cold