Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 162 · 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 “the same ruler”? (a) we keep it the same (b) we change it (c) we measure 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 same ruler (b) where the pencil is (c) which side goes down (d) the number of coins
3. 3.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
4. 4.True or false: a tap handle is a wheel and axle. (a) True (b) False
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
6. 6.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a 30 cm ruler (d) a battery cell
8. 8.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
9. 9.🔮 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
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a battery cell (d) turmeric powder
12. 12.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
13. 13.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a see-saw (c) a crane (d) a doorknob
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 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?
16. 16.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) a battery cell (d) yeast
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
19. 19.🧺 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) coins of one kind
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) distance from the pencil (b) the number of coins (c) which side goes down
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) sit closer to middle (d) jump up and down
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a round pencil (d) a flat table
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
24. 24.True or false: a crowbar is an inclined plane. (a) False (b) True
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
27. 27.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
28. 28.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
29. 29.True or false: a see-saw is a lever. (a) False (b) True
30. 30.True or false: a well pulley uses a pulley. (a) True (b) False
31. 31.⚖️ 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
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the lid gets softer (d) the spoon is hot
34. 34.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
35. 35.⚖️ 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) where the pencil is
36. 36.⚖️ 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) False (b) True
37. 37.🧺 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) turmeric powder
38. 38.⚙️ Which of these is a lever? (a) a flagpole (b) a see-saw (c) a sloping road (d) a slide
39. 39.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a flagpole (c) a ramp (d) a tap handle
40. 40.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley

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