Kinetic Molecular 1-2 Theory of Matter – 9th Grade Worksheet

In a ________________, the particles are closely packed together in a fixed position and vibrate in place.

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS1-4

The process by which a liquid changes into a gas is called ________________.

• evaporation

• condensation

• freezing

• sublimation

Tags

NGSS.MS-PS1-4

Fill in the Blank: Fill in the blank with the correct words.
3. ________________ is the state of matter where particles move freely and spread out to fill the entire container.

• gas

• solid

• liquid

• plasma

Tags

NGSS.MS-PS1-4

When a gas becomes a liquid, this process is known as ________________.

• condensation

• evaporation

• sublimation

• deposition

Tags

NGSS.MS-PS1-4

The state of matter that consists of charged particles and is found in stars is called ________________.

• plasma

• solid

• liquid

• gas

The Kinetic Molecular Theory of Matter explains how the tiny particles (atoms or molecules) that make up all substances behave. According to this theory, all matter is made up of constantly moving particles. The speed and arrangement of these particles determine whether a substance is a solid, liquid, gas, or plasma. When energy (usually in the form of heat) is added or removed, matter can change from one state to another through processes like melting, freezing, condensation, evaporation, sublimation, and deposition. Multiple Choice Questions: Choose the correct answer from the choices for each question. 1. Which state of matter has a definite shape and a definite volume?

• Liquid

• Gas

• Solid

• Plasma

Tags

NGSS.MS-PS1-4

What happens to the particles in a substance when it is heated?

• They slow down and come closer together.

• They speed up and move farther apart.

• They stop moving.

• They disappear.

Tags

NGSS.MS-PS1-4

The process that describes a solid turning directly into a gas is called:

• Condensation

• Sublimation

• Evaporation

• Deposition

Tags

NGSS.MS-PS1-4

In which state of matter do particles have the most energy?

• Solid

• Liquid

• Gas

• Plasma

What phase change occurs when water droplets form on the outside of a cold glass?

• Freezing

• Condensation

• Melting

• Sublimation

Tags

NGSS.MS-PS1-4