Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 972 · 40 questions

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.

1. 1.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a battery cell
3. 3.⚖️ 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 same ruler (c) which side goes down
4. 4.⚖️ 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) the same ruler (c) the kind of coins (d) distance from the pencil
5. 5.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a 30 cm ruler (c) a round pencil (d) a flat table
10. 10.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) equal on both sides (d) always 10
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
13. 13.🧺 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) turmeric powder
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) turmeric powder
15. 15.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a magnet (d) a round pencil
16. 16.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
21. 21.⚖️ 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?
22. 22.⚖️ 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) which side goes down (c) the same ruler (d) the number of coins
23. 23.⚖️ 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
24. 24.⚖️ 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 measure it (c) we keep it the same
25. 25.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
26. 26.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
27. 27.🧺 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
28. 28.True or false: a doorknob is a wheel and axle. (a) True (b) False
29. 29.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
30. 30.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a magnet (c) yeast (d) turmeric powder
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) coins of one kind (d) a flat table
32. 32.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a ramp (c) a sloping road (d) a well pulley
33. 33.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
34. 34.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
35. 35.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.⚖️ 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?
39. 39.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
40. 40.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True

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