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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 163 · 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.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
  2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) a round pencil
  3. 3.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
  4. 4.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
  5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
  6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
  7. 7.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
  8. 8.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
  9. 9.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
  10. 10.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  11. 11.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
  12. 12.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
  13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
  14. 14.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a bottle opener (c) a well pulley (d) a ramp
  15. 15.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the left side (c) the right side (d) both go up
  16. 16.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a bottle opener (d) a tap handle
  17. 17.🧺 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 round pencil (d) turmeric powder
  18. 18.⚖️ 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 change it (c) we keep it the same
  19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we measure it (b) we keep it the same (c) we change it
  20. 20.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
  21. 21.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
  22. 22.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the spoon is hot (d) the lid gets softer
  23. 23.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  24. 24.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
  25. 25.⚖️ 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
  26. 26.True or false: a balloon is needed for the ruler lever. (a) True (b) False
  27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
  28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we keep it the same (c) we measure it
  29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a 30 cm ruler (d) coins of one kind
  30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) coins of one kind
  31. 31.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  32. 32.🧺 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 flat table (d) a battery cell
  33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) where the pencil is (d) the number of coins
  34. 34.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
  35. 35.⚖️ 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) where the pencil is (d) the same ruler
  36. 36.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a well pulley (d) a slide
  37. 37.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  38. 38.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
  39. 39.⚖️ 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
  40. 40.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) a flat table (d) coins of one kind

Answer key

  1. not needed
  2. a magnet
  3. not needed
  4. not needed
  5. True
  6. sit farther from middle
  7. a wheel and axle
  8. the fulcrum
  9. a pulley
  10. 12
  11. an inclined plane
  12. they may swallow them
  13. True
  14. a ramp
  15. the right side
  16. a bottle opener
  17. turmeric powder
  18. we measure it
  19. we change it
  20. equal on both sides
  21. not needed
  22. a lever boosts your push
  23. 6
  24. a pulley
  25. we keep it the same
  26. False
  27. True
  28. we keep it the same
  29. a mirror
  30. a balloon
  31. 1
  32. a battery cell
  33. which side goes down
  34. True
  35. distance from the pencil
  36. a well pulley
  37. 6
  38. False
  39. the same ruler
  40. a balloon

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