P/C Changes and Classifying Matter

What is the definition of chemical changes?

• changes that lead to the formation of new substances with different chemical properties
• characteristics that describe how a substance interacts with other substances
• changes that describe how a substance behaves under different conditions
• changes that alter the form or appearance of a substance, but not its chemical composition

Tags

NGSS.MS-PS1-2

What is the definition of a physical change?

• Alteration in the physical state of matter without changing its chemical composition
• Inherent characteristics that help us identify and describe matter
• Characteristics that describe how a substance behaves under different conditions
• Transformation that results in the creation of new substances

Tags

NGSS.MS-PS1-4

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

• Burning wood
• Cooking an egg
• Melting ice
• Rusting iron

What type of change occurs when a substance reacts with an acid?

• physical change
• neither physical nor chemical change
• chemical change
• both physical and chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Fizzing, foaming, and burning are all examples of

• Chemical change
• Physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A mixture is the result of a physical change because...

• The parts can be separated
• A new substance is made
• There is a chemical reaction
• One part of the mixture disappears

Photosynthesis

• Physical change

• Chemical change

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Sharpening a pencil

• Physical change

• Chemical change