Food coloring spreads out faster in hot water than in cold water. This is mainly because:

• The water molecules in hot water move more quickly
• The molecules in hot water are larger
• The food coloring molecules are small
• Hot water is less dense

Tags

NGSS.MS-PS1-4

When a thermometer is cooled, the red liquid inside the thermometer moves down. This is mainly because:

• Cold liquids sink 
• The glass of the thermometer gets cold 
• The molecules of the liquid move slower and get a little closer together 
• The red liquid is thick 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Any sample of matter has mass and takes up space. The main reason for this is because...

• All matter is heavy
• Matter can be a gas
• Matter is made up of tiny particles that have mass and take up space
• The Earth is made of matter. 

Which of the following describes what happens as a substance changes state?

• the type of molecules change

• the mass of the molecules change

• the shape of the molecules change

• the attraction between molecules change

Tags

NGSS.MS-PS1-4

When molecules change from tightly packed together, to slightly more spread out which of the following change happens?

• gas to liquid

• liquid to gas

• solid to liquid

• liquid to solid

Tags

NGSS.MS-PS1-4

Thermal energy is the measure of

• the motion of the atoms and molecules

• the shape of the atoms and molecules

• the size of the atoms and molecules

• the mass of the atoms and molecules

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What happens as water boils?

• the molecules are destroyed

• the mass of the molecules decreases

• the molecules become separated from each other

• the molecules break down into hydrogen and oxygen atoms

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

As molecule or particle motion increases, the space between molecules

• decreases
• increases
• stays the same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Heating a substance___________ molecule motion. 

• increases
• does not affect
• decreases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

As molecule motion decreases, the space between molecules

• does not change
• increases
• decreases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4