This lesson covers the differences between physical and chemical properties and changes. Physical properties describe the appearance and measurable attributes of substances, while chemical properties relate to how substances react. Physical changes alter the form but not the identity of a substance, whereas chemical changes result in new substances. The lesson includes examples and analogies to clarify these concepts.

Which of the following is NOT a physical property?

• Texture

• Flammability

• Color

• Volume

What is an example of a physical property?

• Reactivity with acid

• Boiling point

• Flammability

• Oxidation

What does a chemical property describe?

• The way a substance looks

• The way a substance reacts

• The mass of a substance

• The volume of a substance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following describes a chemical property?

• Mass

• Density

• Inertness

• Volume

Tags

NGSS.MS-PS1-5

Which of the following is an example of a physical change?

• Rusting iron

• Boiling water

• Baking a cake

• Burning paper

What happens during a physical change?

• Atoms rearrange

• Bonds are broken

• The form changes but the substance remains the same

• New substances are formed

What indicates a chemical change has occurred?

• Change in state

• Formation of a new substance

• Change in size

• Change in shape

Tags

NGSS.MS-PS1-2

Which of the following is a sign of a chemical reaction?

• Crushing a can

• Bending a metal rod

• Melting ice

• Formation of a precipitate

Tags

NGSS.MS-PS1-2

Which of the following is NOT a sign of a chemical change?

• Change in shape

• Formation of a gas

• Color change

• Change in temperature

Tags

NGSS.MS-PS1-2

What is the main difference between physical and chemical changes?

• Chemical changes involve changing state, physical changes do not

• Physical changes involve breaking bonds, chemical changes do not

• Chemical changes form new substances, physical changes do not

• Physical changes form new substances, chemical changes do not