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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 702 · 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.🔮 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
  2. 2.True or false: a ramp is an inclined plane. (a) True (b) False
  3. 3.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a balloon (d) coins of one kind
  4. 4.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
  5. 5.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
  6. 6.⚖️ 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 keep it the same (c) we measure it
  7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a balloon (d) a flat table
  8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
  9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) sit on the middle (d) jump up and down
  10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
  11. 11.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
  12. 12.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
  13. 13.⚖️ 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 same ruler (b) which side goes down (c) the kind of coins (d) distance from the pencil
  14. 14.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a balloon
  15. 15.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
  16. 16.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we change it (b) we keep it the same (c) we measure it
  18. 18.⚖️ 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
  19. 19.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a sloping road (c) a flagpole (d) a steering wheel
  20. 20.⚖️ 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 4 cm to the right to balance it?
  21. 21.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
  22. 22.🧺 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 round pencil (d) a magnet
  23. 23.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
  24. 24.True or false: a bottle opener is a lever. (a) False (b) True
  25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) coins of one kind (d) a 30 cm ruler
  26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) coins of one kind (d) a flat table
  27. 27.⚖️ 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) distance from the pencil (d) the number of coins
  28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
  29. 29.⚖️ 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) where the pencil is (c) which side goes down
  30. 30.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
  31. 31.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
  32. 32.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
  33. 33.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
  34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
  35. 35.🧺 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
  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) distance from the pencil (b) which side goes down (c) the kind of coins
  37. 37.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a sloping road (d) a doorknob
  38. 38.⚖️ 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) False (b) True
  39. 39.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) turmeric powder
  40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?

Answer key

  1. the right side
  2. True
  3. coins of one kind
  4. they may swallow them
  5. a pulley
  6. we measure it
  7. a balloon
  8. True
  9. sit farther from middle
  10. False
  11. a pulley
  12. False
  13. distance from the pencil
  14. a balloon
  15. not needed
  16. a lever
  17. we keep it the same
  18. we change it
  19. a steering wheel
  20. 1
  21. not needed
  22. a magnet
  23. the fulcrum
  24. True
  25. turmeric powder
  26. yeast
  27. which side goes down
  28. 5
  29. where the pencil is
  30. press it gently
  31. needed
  32. not needed
  33. a lever
  34. False
  35. a battery cell
  36. the kind of coins
  37. a doorknob
  38. True
  39. turmeric powder
  40. 2

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