Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 533 · 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 “distance from the pencil”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
3. 3.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
4. 4.⚖️ 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
5. 5.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) coins of one kind (d) a balloon
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.⚖️ 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 closer to middle (d) sit on the middle
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a flat table (d) coins of one kind
10. 10.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.True or false: a steering wheel is an inclined plane. (a) False (b) True
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) turmeric powder
14. 14.⚖️ 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
15. 15.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
16. 16.⚙️ Which of these uses a pulley? (a) a doorknob (b) a slide (c) a flagpole (d) a bottle opener
17. 17.⚙️ Which of these is a lever? (a) a ramp (b) a slide (c) a spoon lifting a lid (d) a steering wheel
18. 18.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
19. 19.🔮 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 right side (b) neither, it balances (c) both go up (d) the left side
20. 20.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
21. 21.🛟 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
22. 22.True or false: a crane is an inclined plane. (a) True (b) False
23. 23.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a round pencil (d) coins of one kind
26. 26.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
27. 27.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a flagpole (d) a see-saw
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a magnet
29. 29.⚖️ 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) distance from the pencil (c) which side goes down (d) the number of coins
30. 30.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a round pencil (d) turmeric powder
32. 32.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
33. 33.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
34. 34.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
36. 36.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a ramp (d) a crowbar
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
38. 38.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
39. 39.True or false: a slide uses a pulley. (a) False (b) True
40. 40.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) a mirror (d) a battery cell

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