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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 202 · 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.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
  2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
  3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a battery cell (d) a 30 cm ruler
  4. 4.⚖️ 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) True (b) False
  5. 5.True or false: a see-saw is a lever. (a) False (b) True
  6. 6.True or false: a well pulley is an inclined plane. (a) True (b) False
  7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
  8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) coins of one kind (d) a round pencil
  9. 9.⚖️ 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 2 cm to the right to balance it?
  10. 10.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
  11. 11.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a crowbar (d) a slide
  12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
  13. 13.⚖️ 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 same ruler
  14. 14.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
  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) the left side (b) both go up (c) neither, it balances (d) the right side
  16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a round pencil (d) a flat table
  17. 17.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
  18. 18.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
  19. 19.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a balloon
  20. 20.⚖️ 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 change it (c) we keep it the same
  21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
  22. 22.⚙️ Which of these is a lever? (a) a doorknob (b) a spoon lifting a lid (c) a sloping road (d) a steering wheel
  23. 23.⚖️ 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
  24. 24.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
  25. 25.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
  26. 26.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
  27. 27.⚖️ 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 keep it the same (b) we change it (c) we measure it
  28. 28.True or false: a crane is a lever. (a) False (b) True
  29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a 30 cm ruler (d) a flat table
  30. 30.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
  31. 31.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
  32. 32.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
  33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
  34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
  35. 35.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a well pulley (c) a see-saw (d) a steering wheel
  36. 36.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a tap handle (c) a see-saw (d) a crane
  37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  38. 38.⚖️ 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) the kind of coins (c) distance from the pencil
  39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
  40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) coins of one kind

Answer key

  1. True
  2. we keep it the same
  3. a battery cell
  4. False
  5. True
  6. False
  7. a lever boosts your push
  8. yeast
  9. 2
  10. they may swallow them
  11. a crowbar
  12. we measure it
  13. the same ruler
  14. needed
  15. the right side
  16. turmeric powder
  17. a pulley
  18. 4
  19. a balloon
  20. we change it
  21. False
  22. a spoon lifting a lid
  23. True
  24. the fulcrum
  25. a lever
  26. not needed
  27. we keep it the same
  28. False
  29. a magnet
  30. True
  31. needed
  32. True
  33. False
  34. we keep it the same
  35. a steering wheel
  36. a tap handle
  37. 1
  38. the kind of coins
  39. True
  40. a mirror

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