Physical and Chemical Changes

Which of the following examples represents a physical change?

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Tags

NGSS.MS-PS1-4

Hydrochloric acid reacts with potassium hydroxide to produce a salt, water,and heat.

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is evidence of a physical change?

• New substance

• Shape Change

• Light produced

• Gas released.

A teacher is demonstrating physical and chemical changes to her class. Which action should they use to demonstrate a chemical change?

• Cutting a piece of paper with scissors.

• Folding a piece of paper into an airplane.

• Ripping a piece of paper with their hands.

• Burning a piece of paper with a match.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change. 

• Chemical then Physical 
• Physical then Chemical
• Both Physical
• Both Chemical

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

Properties that describe how a substance looks, feels, or its state of matter, etc. are __________________.

• Chemical properties

• Physical properties

Tags

NGSS.MS-PS1-4

Properties that describe how a substance reacts with other substances are called?

• Chemical properties
• Physical properties

Tags

NGSS.MS-PS1-2

Why does the image best represent an example of a physical change?

• The pencil can no longer be used.

• The pencil is a different size.

• The materials making up the pencil did not change.

• The materials making up the pencil are different.

Tags

NGSS.MS-PS1-2

What is the definition of chemical change?

• any change that results in the formation of one (or more) new chemical substance(s).

• changing of only the appearance of the object

• matter cannot be created or destroyed, only change form

• changes affecting the form of a chemical substance, but not its chemical composition.

Tags

NGSS.MS-PS1-2

Is Gatorade powder dissolving in water physical or chemical change?

• Physical 
• Chemical

Tags

NGSS.MS-PS1-2