unit 2 review

Bubbles form when two or more substances are combined ...

• Chemical Change
• Physical Change

Is this an example of a physical or chemical change?

• Physical

• Chemical

Melting a chocolate bar is a...

• Physical change

• Chemical change 

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

A change in which NEW substances are formed.

• Chemical change
• Physical change
• Casual change
• Formal change

Causes a change in temperature ...

• Chemical Reaction
• Physical Reaction

Which is a chemical change?

• freezing fruit juice
• slicing a potato
• boiling water
• copper metal turning green

what is the definition of physical change?

• any change that results in the formation of new chemical substances. 
• rusting
• changes affecting the form of a chemical substance, but not its chemical identity.

• any property that is measurable, whose value describes a state of a physical system

Which of the following examples provides evidence of a PHYSICAL change?

• Wood is burned and releases ash and smoke

• Iron rusts over time

• When mixed, baking soda and vinegar form gas bubbles

• Boiling water bubbles when heated

Which of the following are examples of a Chemical Change?

• Iron Rusting

• Gas Burning

• Breaking a glass

• Boiling water

• Burning Wood