← Lever with a ruler and coins lesson New set →

Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 153 · 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: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
  2. 2.⚖️ 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) the same ruler (c) distance from the pencil
  3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (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) flick coins at faces (c) bend it till it snaps (d) press it gently
  5. 5.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
  6. 6.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
  7. 7.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
  8. 8.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
  9. 9.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
  10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
  11. 11.🔮 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
  12. 12.⚖️ 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
  13. 13.🛟 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
  14. 14.⚖️ 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 number of coins (c) which side goes down
  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) where the pencil is
  16. 16.⚖️ 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
  17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
  18. 18.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
  19. 19.🧺 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 mirror
  20. 20.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
  21. 21.⚖️ 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 2 cm to the right to balance it?
  22. 22.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  23. 23.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
  24. 24.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) a lever boosts your push (d) the lid gets softer
  25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) a flat table (d) coins of one kind
  26. 26.⚖️ 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) True (b) False
  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) the same ruler (b) the kind of coins (c) the number of coins (d) which side goes down
  28. 28.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
  29. 29.⚖️ 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?
  30. 30.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a 30 cm ruler (d) coins of one kind
  31. 31.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) coins of one kind
  32. 32.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
  33. 33.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
  34. 34.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a ramp (d) a crowbar
  35. 35.⚖️ 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
  36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) coins of one kind
  37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
  38. 38.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a mirror (d) a round pencil
  39. 39.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) yeast (c) turmeric powder (d) a mirror
  40. 40.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a steering wheel (d) a crowbar

Answer key

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

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids