Physical and Chemical Changes

What type of change can be easily reversed?

• chemical change

• physical change

• both chemical and physical changes

• neither physical or chemical changes

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

• a bike rusting

• toast burning

• butter melting

• food spoiling

Which of the following examples is a physical change but NOT a change of state of matter?

• logs burning

• water freezing into ice cubes

• candle wax melting

• paper being cut

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

• a penny tarnishing

• a mirror being scratched

• hair being cut

• water being boiled

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the best way to separate a mixture of sugar, sand, and water?

• Freeze the mixture, causing the water to be destroyed, then sift the sugar from the sand.

• Filter the sand from the sugar and water, then heat the mixture, causing the water to evaporate.

• Filter the mixture, causing the sugar and sand to get caught but not the water.

• Stir the mixture, causing the water to move above the sugar and sand.

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.

Tags

NGSS.MS-PS1-2

A 5th grade student places baking soda in a cup. The student then adds vinegar to the cup. The student collects the data below from the experiment. Based upon the results of the experiment, which statement BEST describes whether the change is a physical or chemical change.

• The data concludes that a physical change has occurred because it had an increased change in temperature, which resulted in the liquid to start bubbling.

• The data concludes that a physical change has occurred because the color of the liquid changed when you mixed two materials.

• The data concludes that a chemical change has occurred because there was formation of bubbles when the materials reacted to each other.

• The data concludes that a chemical change has occurred because mixing two substances together will always result in a reaction.

Tags

NGSS.MS-PS1-2

Is milk going sour a physical or chemical change?

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Wood that is burning in a brush pile has heat, and produces ashes.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Is freezing juice a physical or chemical change?

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4