Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 311 · 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? Which of these is kept the same? (a) which side goes down (b) the kind of coins (c) distance from the pencil
2. 2.True or false: a mirror is needed for the ruler lever. (a) True (b) False
3. 3.True or false: a flat table is needed for the ruler lever. (a) False (b) True
4. 4.⚖️ 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
5. 5.True or false: a tap handle is an inclined plane. (a) True (b) False
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a round pencil
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
8. 8.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
9. 9.⚖️ 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
10. 10.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
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 keep it the same (b) we change it (c) we measure it
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a magnet
13. 13.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) yeast (d) a 30 cm ruler
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a battery cell (d) a 30 cm ruler
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
18. 18.⚖️ 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 measure it (c) we keep it the same
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.⚖️ 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) the number of coins
21. 21.⚙️ Which of these is a lever? (a) a bottle opener (b) a steering wheel (c) a tap handle (d) a crane
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
24. 24.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
25. 25.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a tap handle (c) a ramp (d) a spoon lifting a lid
26. 26.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
27. 27.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
29. 29.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
30. 30.⚖️ 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
31. 31.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil (d) the same ruler
32. 32.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a tap handle (c) a doorknob (d) a slide
33. 33.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a see-saw (c) a crowbar (d) a tap handle
34. 34.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) both go up (c) neither, it balances (d) the right side
35. 35.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
36. 36.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a mirror
40. 40.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed

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