Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 504 · 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 coins of one kind for the ruler lever? (a) needed (b) not needed
2. 2.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
3. 3.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) turmeric powder
5. 5.⚖️ 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
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
7. 7.⚖️ 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) the kind of coins (d) the same ruler
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a magnet (d) coins of one kind
9. 9.True or false: a sloping road is an inclined plane. (a) False (b) True
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) a flat table (d) coins of one kind
11. 11.⚖️ 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) False (b) True
12. 12.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) a mirror (d) a battery cell
14. 14.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
16. 16.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a well pulley (d) a ramp
17. 17.⚖️ 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
18. 18.🧺 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 balloon
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
21. 21.⚖️ 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
22. 22.True or false: a doorknob is a wheel and axle. (a) True (b) False
23. 23.⚙️ Which of these is a lever? (a) a steering wheel (b) a sloping road (c) a flagpole (d) a see-saw
24. 24.True or false: a see-saw is a lever. (a) True (b) False
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
26. 26.True or false: yeast is needed for the ruler lever. (a) True (b) False
27. 27.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
28. 28.⚖️ 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) where the pencil is (c) distance from the pencil
29. 29.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
30. 30.⚖️ 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
31. 31.🧺 Do we need yeast 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 of these uses a pulley? (a) a flagpole (b) a bottle opener (c) a crowbar (d) a spoon lifting a lid
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
35. 35.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
36. 36.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a crane (d) a tap handle
37. 37.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
39. 39.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
40. 40.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle

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