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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 657 · 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 turmeric powder for the ruler lever? (a) not needed (b) needed
  2. 2.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) turmeric powder (d) a 30 cm ruler
  3. 3.⚖️ 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) False (b) True
  4. 4.True or false: a ramp uses a pulley. (a) True (b) False
  5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) distance from the pencil (c) which side goes down (d) the same ruler
  6. 6.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
  7. 7.True or false: a doorknob is a wheel and axle. (a) False (b) True
  8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a round pencil (d) a flat table
  9. 9.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
  10. 10.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
  11. 11.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
  12. 12.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
  13. 13.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a well pulley (d) a doorknob
  14. 14.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a slide (d) a spoon lifting a lid
  15. 15.⚖️ 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 keep it the same (b) we measure it (c) we change it
  16. 16.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
  17. 17.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
  18. 18.True or false: a bottle opener uses a pulley. (a) False (b) True
  19. 19.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
  20. 20.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  21. 21.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
  22. 22.⚖️ 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 keep it the same (c) we change it
  23. 23.True or false: a see-saw is a lever. (a) True (b) False
  24. 24.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a sloping road (d) a doorknob
  25. 25.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
  26. 26.True or false: a crowbar is an inclined plane. (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: distance from the pencil is kept the same. (a) True (b) False
  28. 28.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  29. 29.True or false: a crowbar is a lever. (a) True (b) False
  30. 30.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a slide (c) a flagpole (d) a ramp
  31. 31.True or false: a flagpole is a wheel and axle. (a) True (b) False
  32. 32.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
  33. 33.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
  34. 34.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
  35. 35.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
  36. 36.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) coins of one kind (d) a 30 cm ruler
  37. 37.True or false: a see-saw is a wheel and axle. (a) True (b) False
  38. 38.⚖️ 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?
  39. 39.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
  40. 40.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a crowbar (d) a sloping road

Answer key

  1. not needed
  2. a 30 cm ruler
  3. False
  4. False
  5. which side goes down
  6. needed
  7. True
  8. yeast
  9. the right side
  10. an inclined plane
  11. a lever
  12. they may swallow them
  13. a bottle opener
  14. a spoon lifting a lid
  15. we measure it
  16. True
  17. an inclined plane
  18. False
  19. an inclined plane
  20. 12
  21. False
  22. we keep it the same
  23. True
  24. a sloping road
  25. True
  26. False
  27. False
  28. a wheel and axle
  29. True
  30. a doorknob
  31. False
  32. the fulcrum
  33. needed
  34. easier
  35. needed
  36. a battery cell
  37. False
  38. 2
  39. press it gently
  40. a crowbar

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