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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 531 · 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.

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  1. 1.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a 30 cm ruler (d) turmeric powder
  2. 2.True or false: a battery cell 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? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the same ruler (d) the number of coins
  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) the spoon is hot (d) a lever boosts your push
  5. 5.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
  6. 6.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
  7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
  8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) a flat table (d) coins of one kind
  9. 9.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
  10. 10.⚖️ 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
  11. 11.⚖️ 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?
  12. 12.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
  13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a mirror (d) a flat table
  14. 14.⚖️ 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
  15. 15.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
  16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
  17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a battery cell (c) a 30 cm ruler (d) a round pencil
  18. 18.True or false: a tap handle is a wheel and axle. (a) True (b) False
  19. 19.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
  20. 20.⚖️ 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?
  21. 21.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
  22. 22.🔮 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
  23. 23.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
  24. 24.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) coins of one kind
  25. 25.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 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?
  26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a balloon
  27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
  28. 28.⚖️ 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) which side goes down (c) the same ruler
  29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
  30. 30.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
  31. 31.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit farther from middle (d) sit closer to middle
  32. 32.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
  33. 33.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
  34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) turmeric powder (d) coins of one kind
  35. 35.⚖️ 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
  36. 36.⚖️ 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 number of coins (b) the same ruler (c) where the pencil is (d) distance from the pencil
  37. 37.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
  38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
  39. 39.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
  40. 40.⚖️ 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) True (b) False

Answer key

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

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