Changes in Energy on the Molecular Level

How are molecules affected when heat is added?

• They vibrate faster

• They vibrate slower

• There is no change

• They start vibrating faster and then stop

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Liquid

• The simplest unit of a chemical compound that can exist and is formed when two or more atoms join together chemically

• A form of matter with indefinite shape and volume

• A state of matter with a definite volume but no definite shape

• To strike or hit something with great force

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When a substance changes from a gas into a liquid, what has happened?

• Heat has been added.

• The molecules have sped up.

• Heat has been removed.

• The molecules have formed crystals

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Atom

• The smallest particle of an element made of electrons, protons, and neutrons

• The simplest unit of a chemical compound that can exist and is formed when two or more atoms join together chemically

• To strike or hit something with great force

• Used to describe a substance that is not chemically reactive

Tags

NGSS.MS-PS1-1

A form of matter with indefinite shape and volume

• Gas

• Liquid

• Solid

• Plasma

Tags

NGSS.MS-PS1-4

In which state are molecules spaced far apart from one another, only colliding occasionally?

• Non-Newtonian fluid

• Gas

• Liquid

• Solid

To strike or hit something with great force

• Collide

• Vibrate

• Thermal Energy

• gas

Tags

NGSS.MS-PS2-1

When enough heat is added to liquid water, the water will change into which state?

• Gas

• ice

• Solid

• It will remain a liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The simplest unit of a chemical compound that can exist and is formed when two or more atoms join together chemically

• Molecule

• Atom

• Collide

• Thermal Energy

Tags

NGSS.MS-PS1-1

Thermal Energy

• The smallest particle of an element made of electrons, protons, and neutrons

• A state of matter with a definite volume but no definite shape

• Used to describe a substance that is not chemically reactive

• It is the total kinetic (motion) energy of tiny particles that make up matter. The faster the particles move, the warmer the matter becomes.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4