Solids Liquids Gases Review

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

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!!

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

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

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

What states of matter qualify as a fluid? Select all that apply.

• Solid

• Liquid

• Gas

• Plasma

Answer explanation

Anything with an indefinite shape is a fluid. That's liquids, gases, and yes, even plasma.

Which principle describes the strength of the buoyant force?

• Archimedes

• Pascal

• Bernoulli

Answer explanation

Supposedly, Archimedes thought of the principle when he was soaking in his tub, trying to figure out how to measure the volume of a crown.

Archimedes's Principle says that the buoyant force on an object equals...

• ...the weight of the object.

• ...the weight of a volume of fluid equal to the object's

• ...the density of the object

Which of the following objects will float in water (density = 1 g/cc)?

• gasoline (density = 0.66 g/cc)

• olive oil (density = 0.9 g/cc)

• mercury (density = 13.55 g/cc)

Answer explanation

Lower density than the fluid means you'll float in or on the fluid!