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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 630 · 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.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
  2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a flat table (c) coins of one kind (d) a round pencil
  3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
  4. 4.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
  5. 5.⚖️ 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) True (b) False
  6. 6.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
  7. 7.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
  8. 8.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a sloping road (c) a crane (d) a tap handle
  9. 9.True or false: a flagpole is a lever. (a) True (b) False
  10. 10.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a round pencil (d) turmeric powder
  11. 11.⚖️ 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) which side goes down (b) the number of coins (c) distance from the pencil (d) the kind of coins
  12. 12.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
  13. 13.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
  14. 14.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
  15. 15.True or false: a crane is a lever. (a) True (b) False
  16. 16.⚖️ 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
  17. 17.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) a 30 cm ruler (d) yeast
  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 kept the same. (a) True (b) False
  19. 19.🔮 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 left side (b) both go up (c) the right side (d) neither, it balances
  20. 20.⚖️ 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 measure it (c) we change it
  21. 21.True or false: a crowbar is a wheel and axle. (a) True (b) False
  22. 22.True or false: a sloping road is a wheel and axle. (a) False (b) True
  23. 23.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
  24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) a balloon
  25. 25.⚖️ 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 same ruler
  26. 26.⚖️ 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) True (b) False
  27. 27.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
  28. 28.⚖️ 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
  29. 29.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
  30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
  31. 31.⚖️ 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
  32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
  33. 33.⚖️ 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 keep it the same (b) we change it (c) we measure it
  34. 34.⚙️ Which of these uses a pulley? (a) a well pulley (b) a crowbar (c) a slide (d) a bottle opener
  35. 35.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a slide (d) a bottle opener
  36. 36.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
  37. 37.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
  38. 38.⚖️ 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 measure it (b) we change it (c) we keep it the same
  39. 39.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
  40. 40.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down (d) where the pencil is

Answer key

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

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