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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 107 · 40 questions
TalentJR

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

NameDateTime takenScore ___ / 40
  1. 1.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
  2. 2.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
  3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we change it (c) we keep it the same
  4. 4.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) a lever boosts your push (d) the spoon is hot
  5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
  6. 6.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
  7. 7.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a battery cell (d) a 30 cm ruler
  9. 9.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a see-saw (d) a doorknob
  10. 10.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
  11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
  12. 12.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
  13. 13.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) yeast (d) a 30 cm ruler
  15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
  16. 16.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
  17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a mirror
  18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a balloon
  19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the same ruler (c) which side goes down
  20. 20.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a round pencil (d) a balloon
  21. 21.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
  22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a magnet
  23. 23.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  24. 24.True or false: a doorknob is an inclined plane. (a) True (b) False
  25. 25.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
  26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
  27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the kind of coins
  28. 28.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
  29. 29.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
  30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
  31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we measure it (b) we keep it the same (c) we change it
  32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we measure it (b) we change it (c) we keep it the same
  33. 33.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a spoon lifting a lid (d) a crane
  34. 34.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
  35. 35.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
  36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
  37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) the kind of coins (b) distance from the pencil (c) which side goes down (d) the same ruler
  38. 38.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
  39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
  40. 40.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed

Answer key

  1. False
  2. True
  3. we keep it the same
  4. a lever boosts your push
  5. False
  6. a pulley
  7. 4
  8. a battery cell
  9. a see-saw
  10. not needed
  11. turmeric powder
  12. a lever
  13. 1
  14. yeast
  15. False
  16. an inclined plane
  17. a mirror
  18. a balloon
  19. the same ruler
  20. a round pencil
  21. False
  22. a magnet
  23. a wheel and axle
  24. False
  25. press it gently
  26. where the pencil is
  27. the kind of coins
  28. needed
  29. 2
  30. False
  31. we measure it
  32. we keep it the same
  33. a spoon lifting a lid
  34. True
  35. easier
  36. False
  37. distance from the pencil
  38. a lever
  39. True
  40. needed

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