Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 879 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a round pencil (d) a 30 cm ruler
2. 2.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
3. 3.⚖️ 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) which side goes down (b) distance from the pencil (c) the same ruler (d) the number of coins
4. 4.⚖️ 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
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
6. 6.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) yeast (d) a 30 cm ruler
9. 9.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
10. 10.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a round pencil (d) a flat table
11. 11.True or false: a magnet is needed for the ruler lever. (a) True (b) False
12. 12.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a tap handle (d) a well pulley
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a balloon (d) turmeric powder
15. 15.True or false: a flat table is needed for the ruler lever. (a) False (b) True
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) bigger on the left (d) always 10
17. 17.⚖️ 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
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
20. 20.⚖️ 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) True (b) False
21. 21.True or false: a sloping road is an inclined plane. (a) False (b) True
22. 22.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (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 change it (b) we measure it (c) we keep it the same
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
27. 27.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) yeast (d) a round pencil
28. 28.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
29. 29.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a spoon lifting a lid (d) a flagpole
30. 30.⚙️ Which of these is an inclined plane? (a) a ramp (b) a bottle opener (c) a doorknob (d) a steering wheel
31. 31.True or false: a see-saw uses a pulley. (a) False (b) True
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
33. 33.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a steering wheel (c) a slide (d) a see-saw
34. 34.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
35. 35.🔮 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) neither, it balances (c) both go up (d) the right side
36. 36.🧺 Do we need a balloon 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? True or false: distance from the pencil is the one thing we change. (a) True (b) False
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) yeast
40. 40.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False

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