← Lever with a ruler and coins lesson New set →

Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 564 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) coins of one kind
  2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the same ruler (c) which side goes down (d) where the pencil is
  3. 3.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
  4. 4.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
  5. 5.⚖️ 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 6 cm to the right to balance it?
  6. 6.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
  7. 7.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
  8. 8.⚖️ 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 closer to middle (d) sit on the middle
  9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
  10. 10.⚖️ 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 change it (b) we keep it the same (c) we measure it
  11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) bigger on the left (d) always 10
  12. 12.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
  13. 13.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
  14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
  15. 15.⚖️ 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) False (b) True
  16. 16.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
  17. 17.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) turmeric powder (d) yeast
  18. 18.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is magnetic (d) the spoon is hot
  19. 19.True or false: a bottle opener is a lever. (a) False (b) True
  20. 20.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
  21. 21.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a slide (c) a flagpole (d) a bottle opener
  22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a flat table
  23. 23.⚖️ 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 keep it the same (c) we change it
  24. 24.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
  25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
  26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
  27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a round pencil (d) a 30 cm ruler
  28. 28.⚖️ 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 keep it the same (c) we change it
  29. 29.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a ramp (d) a sloping road
  30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
  31. 31.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
  32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a round pencil
  33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a mirror (d) coins of one kind
  34. 34.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
  35. 35.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a round pencil (d) a battery cell
  36. 36.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a round pencil (d) a flat table
  37. 37.🔮 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) the left side (c) neither, it balances (d) the right side
  38. 38.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
  39. 39.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
  40. 40.⚖️ 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

Answer key

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

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