Worksheet

Physical and Chemical Change

Grade 5 - Science - On Level

NameDate

  1. Classify this change: paper is cut into small squares.

    • mixture
    • chemical change
    • physical change
    • solution

  2. Which evidence supports the claim that "baking soda and vinegar fizz" is a chemical change?

    • odor and taste change as new substances form
    • the sugar is spread through the water but no new substance is made
    • ash and gases form with different properties
    • gas bubbles form from new substances

  3. Which observation is about new substances in this event: baking soda and vinegar fizz?

    • new substances such as ash appear
    • evaporation can recover the sugar
    • no new material forms during shaping
    • a gas forms that was not there before

  4. Which model step is most important for deciding whether baking soda and vinegar fizz is physical or chemical?

    • count the letters in the event name
    • choose the loudest change every time
    • compare properties before and after the change
    • ignore observations after the change

  5. Why is "the nail is only bent" not the best evidence for "a steel nail rusts"?

    • it is the exact evidence from the event
    • it proves every change is chemical
    • it means matter disappeared
    • it describes a different kind of change

  6. Classify this change: wood burns in a campfire.

    • solution
    • chemical change
    • mixture
    • physical change

  7. Which evidence supports the claim that "wood burns in a campfire" is a chemical change?

    • ash and gases form with different properties
    • odor and taste change as new substances form
    • gas bubbles form from new substances
    • rust forms with different color and properties

  8. Which observation is about new substances in this event: wood burns in a campfire?

    • no new material forms during shaping
    • a gas forms that was not there before
    • a new reddish-brown substance appears
    • new substances such as ash appear

  9. Which model step is most important for deciding whether milk turns sour is physical or chemical?

    • ignore observations after the change
    • choose the loudest change every time
    • compare properties before and after the change
    • count the letters in the event name

  10. Why is "the container simply gets smaller" not the best evidence for "milk turns sour"?

    • it is the exact evidence from the event
    • it means matter disappeared
    • it describes a different kind of change
    • it proves every change is chemical
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