The Motion of Particles

When cold, dry ice and regular share this similarity.

• Dry ice and ice made from water are both solids

• They both have a fixed shape and volume.

• Both look like blocks that have a rigid shape

• all of the above

A state of matter is:

• Bubbles of smoky vapor

• Something that boils instead of melts when placed in cool water.

• the physical form matter takes on as determined by the arrangement and motion of its atoms or molecules.

• particles with macroscopic appearance

In a solid the following is false:

• a macroscopic amount of solid is considered to have a fixed shape and volume.

• the atoms or molecules are closely packed and touching one another in a solid

• Because of the arrangement and movement of their particles, solids are able to flow

• The properties of the solid reflect the arrangement and motion of its molecules.

Tags

NGSS.MS-PS3-4

What is a liquid?

• a substance in the state of matter in which its atoms or molecules are closely packed and touching one another but are not held in fixed positions.

• The molecules that are closely packed and can only vibrate within their fixed positions

• the state of matter in which its atoms or molecules are separate from each other by empty space and can move independently.

• none of the above

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The atoms or molecules of a liquid vibrate as they do within solids. Unlike within a solid, the following occurs:

• the molecules cannot move

• the molecules can also move around each other.

• the molecules are spread apart

• it is hard

Tags

NGSS.MS-PS1-4

How are liquids are able to flow?

• The shape of a macroscopic amount of liquid can change to take on the shape of its container as its molecules flow around each other.

• The molecules of liquids are able to slip past one another, much like grains of sand pouring through an hourglass.

• As the molecules in a liquid, such as water, slide past one another, they fill in any gaps around them. Gravity pulls them downward, and they slide past one another until they have filled up any free space and taken the shape of the lower part of their container.

• All of the above

Gas is the state of matter in which:

• the atoms or molecules are closely packed and touching one another, and they are unable to move around within the solid.

• a substance in the state of matter in which its atoms or molecules are closely packed and touching one another but are not held in fixed positions. T

• atoms look like blocks that have a rigid shape.

• its atoms or molecules are separate from each other by empty space and can move independently

Tags

NGSS.MS-PS1-4

True or False:

A gas's shape is even more changeable than a liquid's.

• True

• False

Tags

NGSS.MS-PS3-4

How are gases like solids and liquids?

• molecules in a gas are crowded together in a tightly packed arrangement

• molecules in a gas do not even touch, except when they run into one another.

• the particles of gases are always moving.

• none of the above

How do gas particles move independently?

• The molecules of a gas move in random directions until they happen to fill the entire container.

• The molecules that make up a gas are closely packed but can slip past one another within the gas.

• the gas molecules cannot spread any further apart or come any closer together.

• all of the above

Tags

NGSS.MS-PS1-4