Physical vs. Chemical Changes

Physical vs. Chemical Changes

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Characteristics of physical changes

Matter remains the same kind of matter.

No new substances are formed.

Possible indicators of physical changes

• Size changes

• Shape changes

• Phase changes (solid to liquid, etc.)

Multiple Select

What would be examples of physical changes?

• cutting paper to make snowflakes

• water freezing into ice

• toasting a marshmallow

• combining baking soda and vinegar

Characteristics of chemical changes

• Matter changes into a different kind of matter.

• New substances are formed as a result of the change.

Possible indicators of chemical changes

• size changes

• shape changes

• phase changes

• color changes

• heat produced or reduced

• bubbling or fizzing (gases being released)

• odor changes as atoms link up differently forming new substances

Multiple Select

What are examples of chemical changes?

• cutting paper into snowflakes

• water freezing to make ice

• toasting a marshmallow

• combining vinegar and baking soda

Multiple Choice

Lighting a Match

• Physical Change

• Chemical Change

Multiple Choice

Rusting Nail

• Physical Change

• Chemical Change

Multiple Choice

Why is burning wood a chemical change?

• The process occurs quickly.

• The process creates a new substance.

• The process can be reversed.

• The process can be repeated.

Multiple Choice

The Statue of Liberty undergoing a color change indicates what?

• Physical Change

• Chemical Change

Multiple Choice

If you change a substance into a new substance...

• Partial Change
• Physical Change
• Chemical Change
• Freezing

Multiple Choice

A family goes camping and creates a fire to roast marshmallows. The next morning, the kids notice that the logs are no longer there, and all that remains are ashes. Which best explains why the ashes from a log are evidence of a chemical change?

• The color of the wood changed from brown to gray. 
• The wood breaks down into smaller matter when burned.
• The ashes cannot be put back together to create a log again.
• Something was added to the log, and it cannot be removed. 

Multiple Choice

What type of change is indicated by a change in temperature, color, or production of gas?

• Physical change

• Chemical change

• State change

• Phase change

Multiple Choice

A banana rotting.

• physical

• chemical

Multiple Choice

What happens to the molecules of a substance during a chemical change?

• They stay the same

• They change into different molecules

• They move closer together

• They move farther apart

Multiple Choice

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

• Boiling water

• Dissolving sugar in water

• Rusting of iron

• Melting ice

Multiple Select

Examples of chemical changes in matter

• Cutting a piece of paper
• burning the wick of a candle

• baking a cake

• Freezing of water

Multiple Choice

A change in matter that produces one or more new substances

• physical change

• chemical change

Multiple Choice

What is the primary difference between a physical and a chemical change?

• Physical changes alter the chemical composition

• Chemical changes alter the chemical composition

• Physical changes create new substances

• Chemical changes do not alter the chemical composition

Multiple Choice

Anika was baking a cake and noticed that the batter turned into a fluffy cake in the oven. If you change a substance into a new substance, what type of change is it?

• Partial Change

• Physical Change

• Chemical Change

• Freezing