Unit 2 Matter

Matter is defined as anything that has

• Mass and volume

• Mass and gas

• Solid and liquid

What is it called when a gas goes directly to a solid?

• Freezing

• Melting

• Deposition

What is density?

• A) How tightly packed the molecules are in an object.

• B) The comparison of how much matter is in an object and how much space it takes up.

• Both A and B

Which term refers to the amount of matter in a substance?

• Mass

• Volume

• Temperature

_____ is when a substance is altered but it is not transformed into another substance.

• A) A physical change

• B) A chemical change

• Both A and B

Which of the following is an example of a physical change?

• Water boiling

• Mold growing

• A match burning

Tags

NGSS.MS-PS1-4

Which of the following is a sign that a chemical change has occurred?

• A) Something new has formed

• B) There is a change in the color or odor

• Both a and b

Tags

NGSS.MS-PS1-2

When water freezes, it undergoes

• A chemical change

• A physical change

• Vaporization

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

All matter is made up of small particles called

• Molecules

• Compounds

• Atoms

Tags

NGSS.MS-PS1-1

The number of protons in the nucleus is the

• Atomic mass

• Atomic number

• Electron cloud