Solids, Liquids, and Gases Review

The Kinetic Theory of Matter says that all matter is made up of...

• ...small particles that are always moving.

• ...large particles that cannot touch.

• ...small particles that have no mass.

Answer explanation

Kinetic means motion, so that should be your hint that these particles can't stop, won't stop!

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The higher the temperature of an object, the _________ the object's particles will move.

• slower

• faster

• more erratically

Answer explanation

Temperature = average kinetic energy of the particles, so more temperature = more kinetic energy = faster movement!

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which state of matter is incredibly rare on Earth?

• solid

• liquid

• gas

• plasma

Answer explanation

Plasmas require a lot of energy to form; usually more than they can get here on Earth!

What state of matter has particles that are stuck together and can only vibrate back and forth?

• Solid

• Liquid

• Gas

What is the highest energy state of matter that occurs frequently on Earth?

• solids

• liquids

• gases

Answer explanation

Gas particles have so much energy that they can go wherever they want! Weeeeeee!!

Which states of matter have a definite shape? Select all that apply.

• Solid

• Liquid

• Gas

Answer explanation

Only solids have a definite shape! Liquids and gases both take the shape of their container; think, floor-shaped!

Look at this graph. What phase changes could region B represent?

• Melting

• Freezing

• Boiling

• Condensing

Answer explanation

Melting and freezing are opposites of each other, so when one is going on from adding heat, the other would happen if you took heat away instead.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Look at this graph. In what sections could you find a liquid?

• A

• B

• C

• D

• E

Answer explanation

B is melting and D is boiling. Therefore, liquid can be found while melting, after finishing melting, and while boiling: B, C, and D!

Tags

NGSS.MS-PS1-4

The heat of fusion of an object is the amount of heat it takes...

• ...to heat it up to its melting point.

• ...to melt it once it's at its melting point.

• ...to heat it up to its boiling point.

Answer explanation

Although it takes energy to get a substance TO its melting point or boiling points, heat of fusion and vaporization account for the extra energy it takes to ACTUALLY change phases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When a substance heats up, thermal expansion causes its volume to...

• ...increase

• ...decrease

Answer explanation

Thermal expansion = expansion with heat!

Tags

NGSS.MS-PS1-4