Matter Qualities

A piece of solid wax is placed in a pan and heated on a stove. After a while, the solid wax becomes a liquid. Which one of the following explains why the wax becomes a liquid?

• Some of the wax molecules get smaller.

• Some of the wax molecules are destroyed.

• The wax molecules change into water molecules.

• The wax molecules are more loosely connected to each other.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Why does liquid candle wax flow but solid candle wax does not?

• Because the molecules of liquid candle wax are softer than the molecules of solid candle wax

• Because the molecules of liquid candle wax weigh less than the molecules of solid candle wax

• Because the molecules of liquid candle wax are moving but the molecules of solid candle wax are not

• Because the molecules of liquid candle wax can easily move past one another but the molecules of solid candle wax cannot

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

An artist heats a solid iron rod and bends it into a new shape. The iron cools down when the artist is finished. What happens to the iron atoms as the solid iron rod cools?

• The iron atoms move more quickly.

• The iron atoms slow down and stop moving.

• The iron atoms slow down but do not stop.

• The speed of the iron atoms does not change.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which statement describes the molecules of a gas?

• The molecules are soft.

• The molecules do not move.

• The molecules are far apart from one another.

• The molecules are often in contact with one another.

Tags

NGSS.MS-PS1-4

About how many atoms would it take to make a line across this dot . ?

• 6

• 600

• 6000

• 6,000,000

Which of the following describes the motion of the molecules in a glass of liquid water?

• The molecules are not moving.

• The molecules are moving at different speeds.

• The molecules are all moving at the same speed.

• The molecules move only when the glass of water is moving.

When a substance changes from a liquid to a solid, which of the following is TRUE?

• The molecules of the substance get heavier.

• The molecules of the substance change shape.

• The molecules of the substance change from soft to hard.

• The molecules of the substance connect more strongly to one another.

Tags

NGSS.MS-PS1-4

There is a solid wooden table with a cup of water sitting on it. Which of the following statements about the atoms and molecules of the table and the atoms and molecules of the water is TRUE?

• The atoms and molecules of both the liquid water and the table are moving.

• The atoms and molecules of both the liquid water and the table are not moving.

• The atoms and molecules of the liquid water are not moving, and the atoms and molecules of the table are moving.

• The atoms and molecules of the liquid water are moving, and the atoms and molecules of the table are not moving.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Why can gases be compressed more easily than solids?

• Because the molecules of gases are softer than the molecules of solids

• Because the molecules of gases weigh less than the molecules of solids

• Because the molecules of gases move faster than the molecules of solids

• Because the molecules of gases are farther apart than the molecules of solids

Tags

NGSS.MS-PS2-2

Most sidewalks are made out of solid concrete sections. There are spaces between the sections. What happens to the spaces during a hot day in the summer and why?

• The spaces get wider because the concrete sections shrink.

• The spaces get narrower because the concrete sections expand.

• The spaces stay the same because the concrete sections does not shrink or expand.

• Some spaces get wider, some spaces get narrower, and some spaces stay the same because each concrete section behaves differently on a hot summer day.

Tags

NGSS.MS-PS1-4