The Kinetic Molecular Theory explains that all matter is composed of atoms and molecules in constant motion. The energy of these particles varies with temperature: higher temperatures increase energy and movement, while lower temperatures decrease them. In solids, particles are tightly packed and move minimally. In liquids, particles have more energy and can flow. In gases, particles have the most energy and move freely. This theory helps understand the behavior of matter in different states.

What does the Kinetic Molecular Theory state about the nature of matter?

• All matter is composed of particles that are stationary.

• All matter is composed of particles that only move in gases.

• All matter is composed of particles that are always moving.

• All matter is composed of particles that only move in liquids.

How does temperature affect the energy of particles?

• Temperature has no effect on particle energy.

• Higher temperatures increase particle energy.

• Lower temperatures increase particle energy.

• Higher temperatures decrease particle energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

• Gases

• Liquids

• Plasma

• Solids

Tags

NGSS.MS-PS1-4

What characteristic of liquids allows them to fill the shape of any container?

• Particles in liquids are tightly packed.

• Particles in liquids are sparse and move freely.

• Particles in liquids are stationary.

• Particles in liquids have more energy and freedom to move.

What is the relationship between temperature and particle energy according to the Kinetic Molecular Theory?

• Lower temperature means more particle energy.

• Temperature does not affect particle energy.

• Higher temperature means more particle energy.

• Higher temperature means less particle energy.

Tags

NGSS.MS-PS1-4