Physical and Chemical Changes

Is spoiling food (food that is going bad) a physical or chemical change?

• Physical Change

• Chemical Change

mowing the lawn

• physical change

• chemical change

Cutting your hair is an example of a(n) __________ .

• physical change

• chemical change

• photosynthesis

• selective breeding

A student is investigating changes with common classroom materials. Which of the following BEST describes the conclusion the student can make about the investigations?

• The paperclip shows evidence of a physical change by changing the shape of the object, whereas the pencil eraser and hole puncher show evidence of a physical change by changing the size of the object.

• All three investigations show evidence of a physical change due to a change in the color of the original substance.

• The paperclip and hole puncher shows evidence of a physical change by changing the chemical properties of the original object, whereas the pencil eraser shows evidence of a physical change by changing the size of the object.

• All three investigations show evidence of a physical change due to a change in state of matter.

A group of students investigated physical and chemical changes using paper.  The students recorded their observations in a table.
Which student correctly recorded all the changes that took place?

• Student 1

• Student 2

• Student 3

• Student 4

corroding metal

• physical change

• chemical change

A change that does not result in a new substance.

• Chemical Change

• Physical Change

glass breaking

• physical change

• chemical change

This is a type of change in which matter remains the same.

• Physical

• Chemical

Burning wood

• Physical

• Chemical