Physical and Chemical Changes

Exploding fireworks is an example of a(n) __________ .

• physical change 

• chemical change 

• static electricity

• heredity

a rusting bicycle

• physical change

• chemical change

A bike rusts

• Physical

• Chemical

Is squeezing oranges to make orange juice a physical or chemical change?

• Physical Change

• Chemical Change

Three students at Mountain Park Elementary were given an assignment by their science teacher to plan and carry out experiments where chemical changes would occur. The chart shows each student’s plan and the results he or she recorded. Which statement is true about the experiments?

• Student A was the only one to create an experiment where a color change occurred. This shows evidence of a chemical change.

• Student A, Student B, and Student C all created experiments where chemical changes occurred. Student A observed a color change, Student B saw bubbles, and Student C was able to dissolve salt.

• Student B and Student C created experiments were chemical changes occurred. Student A just dyed her water. Student B and Student C both changed their substances to prove that they had chemical changes. Student B created a gas while Student C got rid of the salt.

• Student B was the only one to create an experiment with evidence of a chemical change. She created a new substance, a gas.

What type of change can be easily reversed?

• chemical change

• physical change

• both chemical and physical changes

• neither physical or chemical changes

Rotting bananas show a

• Chemical Change

• Physical Change

Getting a haircut

• Physical

• Chemical

frying an egg

• physical change

• chemical change

A teacher is demonstrating physical and chemical changes to their class. Which action should they use to demonstrate a chemical change?

• Cutting a piece of paper with scissors.

• Folding a piece of paper into an airplane.

• Ripping a piece of paper with their hands.

• Burning a piece of paper with a match.