Chemical and chemical changes

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

Which of these is a result of a chemical change?

• A mixture
• A solution
• A new substance
• Melting or freezing

which of these example is a physical change?

• 
• 
• 
• 

is the picture chemical or physical

• chemical

• physical

Identify the change shown in the picture.

• Irreversible physical change

• Irreversible chemical change

• reversible physical change

• reversible chemical change

What does the picture represent ?

• physical change

• chemical change

a rusting bicycle

• physical change
• chemical change

The difference between a Physical change and a Chemical change is…

• Physical change is only a change to the outside appearance.

• Chemical change is when matter is changed into something new.

• Atoms are rearranged in chemical changes & not in physical.

• All are correct.

Identify what type of change happening in the picture below...

• Chemical Change

• Physical Change

• Endothermic Reaction

• Exothermic Reaction