Physical and Chemical Changes and Properties

Physical Vs. Chemical Changes/Properties

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Physical Property Examples:

• Appearance

• Hardness

• Conductivity

• Malleability

• Melting Point

• Boiling Point

Chemical Property Examples

• Flammability

• Combustibility

• Reactivity

Multiple Choice

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

• Density

• odor

• Ability to explode

• Boiling point

Multiple Choice

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

• The color of something

• Combustion

• Chemical reaction

• flammability

Physical Changes

Remember that a physical change is a change made to material that DOES NOT change the composition of the substance.

Examples Include:

• Boiling

• Melting

• Dissolving (Solubility)

• Shredding (tearing apart)

Chemical Changes

Remember a chemical change is a change of one substance to a NEW & DIFFERENT substance

It CANNOT go back to the form that it was once in

Examples include:

• Color change

• Production of a gas (fizzing/ bubbling)

• Formation of a precipitate

• Release of energy (light or explosion)

• Burning

Multiple Choice

Is a a rusting bicycle a chemical or physical change?

• Chemical

• Physical

Multiple Choice

Is hammering wood together to build a house a chemical or physical change?

• Chemical

• Physical

Multiple Choice

When you break a cracker into pieces it is a...

• Chemical change

• Physical change

Multiple Choice

Rust on an iron bar is an example of chemical change.

• True

• False

Multiple Choice

Fizzing, foaming, and burning are all examples of

• Chemical change

• Physical change

Multiple Choice

Change in density is a physical change.

• True

• False

Multiple Choice

Change in color is a physical change.

• True

• False

Multiple Choice

Freezing Juice?

• Physical Change

• Chemical Change

Multiple Choice

Is melting butter for popcorn a chemical or physical change?

• Chemical

• Physical