What is density?

• The total mass of an object

• How much space an object takes up

• Mass divided by volume

• The weight of an object in water

Which property does NOT change when you have more or less of a pure substance?

• Volume

• Melting point

• Mass

• Weight

If you break a pure substance into smaller pieces, what happens to its melting point?

• It increases

• It stays the same

• It decreases

• It depends on the size

What is a solution?

• A mixture of a solid and a gas only

• Two liquids that don't mix

• A solute dissolved in a solvent

• Any mixture of substances

How does increasing temperature usually affect solubility?

• Makes substances less soluble

• Has no effect on solubility

• Changes the color only

• Increases solubility

Tags

NGSS.MS-PS1-4

Match the following scenarios with the changes in density:

• Heating a solid without melting

• Stays exactly the same

• Evaporating a liquid completely

• Disappears completely

• Water freezes

• Decreases

• Compressing a gas

• Increases

Tags

NGSS.MS-PS1-4

Which is a physical property of matter?

• How it burns

• How it rusts

• Magnetic attraction

• How it spoils

Tags

NGSS.MS-PS1-4

What happens to the mass of a substance when it dissolves?

• It stays the same

• It disappears

• It increases

• It decreases

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How can you increase the rate at which salt dissolves in water?

• Add more water only

• Decrease the temperature

• Crush the salt into smaller pieces

• Let it sit undisturbed

(a)   is NOT a physical property of matter.

• Electrical conductivity
• Chemical reactivity
• Boiling point
• Magnetic properties