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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 14 · 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? What do we do with “the same ruler”? (a) we measure it (b) we change it (c) we keep it the same
  2. 2.⚖️ 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
  3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) which side goes down (c) the same ruler (d) the number of coins
  4. 4.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  5. 5.🔮 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) neither, it balances (c) the right side (d) the left side
  6. 6.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
  7. 7.True or false: yeast is not needed for the ruler lever. (a) True (b) False
  8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) yeast (d) coins of one kind
  9. 9.⚖️ 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
  10. 10.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
  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.⚖️ 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) distance from the pencil (b) which side goes down (c) the kind of coins (d) the same ruler
  13. 13.True or false: a flat table is needed for the ruler lever. (a) True (b) False
  14. 14.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
  15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
  16. 16.⚖️ 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) False (b) True
  17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) a 30 cm ruler (d) a flat table
  18. 18.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
  19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
  20. 20.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
  21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) turmeric powder
  22. 22.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a bottle opener (c) a slide (d) a well pulley
  23. 23.⚖️ 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) True (b) False
  24. 24.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a magnet (d) turmeric powder
  25. 25.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a magnet (d) a balloon
  26. 26.True or false: a sloping road is a wheel and axle. (a) True (b) False
  27. 27.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a balloon (d) a flat table
  28. 28.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
  29. 29.⚖️ 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) False (b) True
  30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
  31. 31.⚖️ 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 kind of coins (c) which side goes down
  32. 32.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  33. 33.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a crane (d) a crowbar
  34. 34.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
  35. 35.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 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?
  36. 36.⚖️ 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
  37. 37.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
  38. 38.True or false: yeast is needed for the ruler lever. (a) True (b) False
  39. 39.⚖️ 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
  40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a round pencil (d) a flat table

Answer key

  1. we keep it the same
  2. we measure it
  3. which side goes down
  4. a wheel and axle
  5. the right side
  6. not needed
  7. True
  8. yeast
  9. a lever boosts your push
  10. an inclined plane
  11. a lever
  12. distance from the pencil
  13. True
  14. not needed
  15. a magnet
  16. False
  17. a mirror
  18. not needed
  19. False
  20. False
  21. turmeric powder
  22. a slide
  23. True
  24. a 30 cm ruler
  25. coins of one kind
  26. False
  27. a flat table
  28. not needed
  29. False
  30. we change it
  31. the kind of coins
  32. an inclined plane
  33. a crowbar
  34. press it gently
  35. 4
  36. where the pencil is
  37. a wheel and axle
  38. False
  39. we keep it the same
  40. a battery cell

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