Temperature and Thermal Energy

What is a molecule?

• A single atom

• A group of atoms joined together in a particular way

• A type of chemical reaction

• A form of energy.

Tags

NGSS.MS-PS1-1

Fill in the blank: A molecule is ______.

• a single atom

• a group of atoms joined together in a particular way

• a type of chemical reaction

• a form of energy

Tags

NGSS.MS-PS1-1

What is the chemical formula for a water molecule?

• H2O

• CO2

• O2

• H2

Tags

NGSS.MS-PS1-1

A water molecule is made up of one ______ atom and two hydrogen atoms.

• oxygen

• nitrogen

• carbon

• helium

Tags

NGSS.MS-PS1-1

What are the temperatures of the two water samples used in the simulation?

• 50°C and 20°C

• 70°C and 10°C

• 60°C and 30°C

• 80°C and 40°C

Tags

NGSS.MS-PS1-4

In the simulation, food coloring is added to both water samples. The food coloring spreads more quickly through the ______ water than the cold water.

• cold

• hot

• lukewarm

• frozen

Tags

NGSS.MS-PS1-4

What happens to the molecules of a substance when it gets hotter?

• A) They move slower

• B) They move faster

• C) They stop moving

• D) They move at the same speed.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When a thing gets hotter, its molecules are moving ____.

• slower

• faster

• not at all

Tags

NGSS.MS-PS1-4

What happens to the movement of molecules when a thing gets colder?

• They move faster

• They move slower

• They stay the same

• They disappear

Tags

NGSS.MS-PS1-4

When a thing gets colder, its molecules are moving ____.

• faster

• slower

• at the same speed

Tags

NGSS.MS-PS1-4