Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 140 · 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.⚖️ 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
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) the kind of coins (b) which side goes down (c) the same ruler (d) where the pencil is
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 hot (c) the spoon is magnetic (d) a lever boosts your push
4. 4.True or false: a crane is a lever. (a) True (b) False
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) a flat table (d) coins of one kind
6. 6.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a steering wheel (d) a tap handle
7. 7.⚖️ 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) distance from the pencil (b) the same ruler (c) the number of coins (d) the kind of coins
8. 8.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
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 flat table (d) coins of one kind
10. 10.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a spoon lifting a lid (d) a steering wheel
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) the right side (c) the left side (d) neither, it balances
12. 12.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a tap handle (c) a crane (d) a slide
13. 13.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) turmeric powder (d) a magnet
14. 14.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a sloping road (d) a tap handle
15. 15.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) yeast
17. 17.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
18. 18.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
20. 20.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
21. 21.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a doorknob (d) a see-saw
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
24. 24.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a flagpole (c) a steering wheel (d) a crowbar
25. 25.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) coins of one kind
28. 28.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
29. 29.True or false: a tap handle is a wheel and axle. (a) False (b) True
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a round pencil
31. 31.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
32. 32.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a well pulley (c) a crane (d) a tap handle
33. 33.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
34. 34.True or false: a steering wheel uses a pulley. (a) False (b) True
35. 35.⚖️ 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?
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
37. 37.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a round pencil (d) a mirror
38. 38.True or false: a well pulley is a lever. (a) True (b) False
39. 39.⚙️ Which of these is an inclined plane? (a) a slide (b) a spoon lifting a lid (c) a steering wheel (d) a tap handle
40. 40.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed

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