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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 249 · 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? Which of these is the one thing we change? (a) the number of coins (b) where the pencil is (c) the kind of coins (d) distance from the pencil
  3. 3.⚖️ 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?
  4. 4.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
  5. 5.🛟 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
  6. 6.⚙️ Which of these uses a pulley? (a) a crowbar (b) a crane (c) a tap handle (d) a ramp
  7. 7.🧺 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
  8. 8.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) always 10 (d) bigger on the left
  9. 9.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a 30 cm ruler (d) a mirror
  10. 10.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
  11. 11.⚖️ 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) True (b) False
  12. 12.True or false: a sloping road is an inclined plane. (a) True (b) False
  13. 13.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 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?
  14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
  15. 15.⚖️ 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 number of coins
  16. 16.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
  17. 17.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) yeast (c) a round pencil (d) a flat table
  18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
  19. 19.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
  20. 20.True or false: a flat table is needed for the ruler lever. (a) True (b) False
  21. 21.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  22. 22.True or false: a ramp uses a pulley. (a) True (b) False
  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 what we measure. (a) True (b) False
  24. 24.True or false: a crowbar is a lever. (a) True (b) False
  25. 25.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
  26. 26.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  27. 27.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a slide (c) a tap handle (d) a doorknob
  28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) a magnet
  29. 29.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
  30. 30.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
  31. 31.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
  32. 32.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a balloon (d) yeast
  33. 33.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a doorknob (d) a spoon lifting a lid
  34. 34.⚖️ 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
  35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
  36. 36.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  37. 37.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
  38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  39. 39.🔮 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 right side (b) both go up (c) the left side (d) neither, it balances
  40. 40.⚖️ 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

Answer key

  1. we keep it the same
  2. distance from the pencil
  3. 12
  4. 3
  5. they may swallow them
  6. a crane
  7. a mirror
  8. equal on both sides
  9. a 30 cm ruler
  10. 6
  11. False
  12. True
  13. 8
  14. easier
  15. the number of coins
  16. False
  17. yeast
  18. False
  19. 6
  20. True
  21. 6
  22. False
  23. False
  24. True
  25. 6
  26. 5
  27. a slide
  28. a magnet
  29. an inclined plane
  30. not needed
  31. 3
  32. coins of one kind
  33. a doorknob
  34. the same ruler
  35. False
  36. 10
  37. sit farther from middle
  38. 10
  39. the right side
  40. True

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