Unit 5 Practice

Which of the following examples represents a physical change?

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When sugar dissolves in water a ______________ change occurs.

• Physical change

• Chemical Change

Tags

NGSS.MS-PS1-2

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 physical change is

• a change where the characteristics do not change the substance

• a change where the characteristics do change the substance

• a change where the chemistry changes

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

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

NGSS.MS-PS1-5

Is Gatorade powder dissolving in water physical or chemical change?

• Physical 
• Chemical

Tags

NGSS.MS-PS1-2

Which of the following is NOT a clue that a chemical reaction has taken place?

• Changing size

• Changing color

• A gas being formed

• Formation of a precipitate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is forming Playdoh into the shape of a snowman a physical or a chemical change?

• Physical Change
• Chemical Change