Exploring Chemical and Physical Changes

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

• Formation of a new substance

• Change in state of matter

• Release of gas

• Change in temperature

Tags

NGSS.MS-PS1-4

What is a common property of acids?

• They feel slippery

• They taste sour

• They are unreactive

• They turn red litmus paper blue

Which phase change involves a solid turning directly into a gas?

• Melting

• Freezing

• Sublimation

• Condensation

Tags

NGSS.MS-PS1-4

Which of the following is a chemical change?

• Ice melting

• Water boiling

• Iron rusting

• Sugar dissolving in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Identify the physical change from the following scenarios.

• Burning wood

• Baking a cake

• Dissolving sugar in water

• Digesting food

Tags

NGSS.MS-PS1-4

Which of the following statements best describes a base?

• Bases have a pH less than 7

• Bases turn blue litmus paper red

• Bases feel slippery and taste bitter

• Bases are unreactive with acids

Explain why boiling water is considered a physical change.

• It involves a chemical reaction

• It results in a new substance

• It changes the state of water without altering its chemical composition

• It produces heat

Tags

NGSS.MS-PS1-4

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

• Melting butter

• Evaporating alcohol

• Burning gasoline

• Freezing water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Predict what happens to the pH of a solution when an acid is added to it.

• The pH increases

• The pH decreases

• The pH remains the same

• The pH becomes neutral

Analyze the following scenario: A piece of metal is heated until it glows red and then allowed to cool. What type of change has occurred?

• Chemical change

• Physical change

• Both chemical and physical change

• No change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5