Comparing mass and weight · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.
En anglais

Heavy or light?

Mathematics · Measurement · ages 4-6
Name ______________________   Date ____________

  1. Kim safely lifts a box and a ball. The ball pulls down less strongly. Kim says the ball is lighter than the box.

    Circle one:   True   False

  2. Two toys are safe to lift. How can you compare their weights without a balance?

    • Look at their different colours
    • Hold and compare downward pulls
    • Measure their different lengths
    • Count all their separate parts

  3. A book and a cotton ball are safe for Mia to lift. The book pulls down more strongly in her hand. Which is heavier?

    • The book
    • The cotton ball
    • They weigh the same

  4. Which word means an object weighs less than another?

    • Heavier
    • Lighter
    • Bigger

  5. Three equal-arm balances started level. Balance 1 stays level. On balance 2 the left pan goes down. On balance 3 the left pan goes up. Which balance has the lighter object on the left? Write its number.

    Answer: ______________

  6. An empty equal-arm balance starts level. An apple and a leaf are put in its pans. The apple side goes down. Which is heavier?

    • The leaf
    • The apple
    • They weigh the same

  7. A bag is heavier than a hat. Which sentence describes the same comparison?

    • The bag is lighter than the hat
    • The bag weighs the same as the hat
    • The hat is lighter than the bag
    • The hat is heavier than the bag

  8. An equal-arm balance started level. With a ball and a hat in its pans, the ball's pan goes up. The ball is heavier than the hat.

    Circle one:   True   False

  9. Zara says bigger objects are always heavier. Is looking at size alone a reliable way to compare weights?

    • Yes, larger objects are always heavier
    • No, smaller objects are always heavier
    • No, size alone does not tell weight

  10. An empty equal-arm balance starts level. Two sealed boxes are put in its pans and it stays level. One box looks bigger. What does the balance show?

    • Size decides which is heavier
    • Both boxes weigh the same
    • The left box weighs more
    • The right box weighs more
LightMySky · lightmysky.comW1-mt_-P1kdZhHbL-s1

Answer key

For grown-ups. Fold this page away before handing over the rest.

Heavy or light? W1-mt_-P1kdZhHbL-s1

  1. True · The weaker downward pull means the ball is lighter in this comparison.
  2. Hold and compare downward pulls · Holding the toys lets you compare their downward pulls.
  3. The book · The book pulls down more strongly, so it is heavier.
  4. Lighter · Lighter means less weight.
  5. 3 · The lighter object's pan goes up. That happens on balance 3.
  6. The apple · The pan that goes down holds the heavier object, so the apple is heavier.
  7. The hat is lighter than the bag · If the bag weighs more, the hat weighs less.
  8. False · The pan that goes up holds the lighter object, so the ball is lighter than the hat.
  9. No, size alone does not tell weight · A smaller object can be heavier. Size alone does not tell you how heavy something is.
  10. Both boxes weigh the same · A level equal-arm balance shows equal weight, even when the boxes differ in size.
Worksheet · LightMySky