PARTICLE NATURE OF MATTER

When molecules of matter are heated to their boiling point, energy pulls them apart from one another so they no longer have contact. The

______ molecules vaporize and become vapor molecules.

• solid

• liquid

• gas

Which of the following best describe gas particles?

• almost no intermolecular forces

• closely packed in an orderly arragement

• vibrate in fixed position

• move slowly

Suppose you have three identical test tubes that contain equal masses of a solid, liquid, and gas form of the same substance. Which form of the substance has the largest volume and why?

• Gas: It expands to fill the container

• Liquid: It takes the shape of the container

• Solid: It has the hardest surface.

• None: All of them have the same volume

A ________ is a state of matter in which atoms or molecules do not have enough energy to move.

• liquid

• solid

• gas

Which of the following best explains why solids do not change much when pressure is applied to them?

• The particles in a solid have large spaces between them.

• The particles in a solid keep vibrating.

• The particles in a solid are packed very close to each other.

• The particles of solid have weak intermolecular forces.

Which substance does not have a definite shape, color, or texture?

• milk

• air

• metal

• grass

In which state of matter are particles spread farthest apart from one another?

• gas

• liquid

• solid

Compared to gases, liquids can be easily compressed.

• FALSE

• TRUE

Which of the following is NOT true about liquid?

• flows and diffuses slowly

• has definite volume

• no definite shape

• no intermolecular force

Existence of a substance as a solid or a gas largely depends on:

• intermolecular forces

• thermal energy

• temperature

• all of the choices