Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 604 · 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? True or false: the kind of coins is kept the same. (a) True (b) False
3. 3.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
4. 4.⚖️ 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) where the pencil is (b) the number of coins (c) distance from the pencil (d) which side goes down
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
7. 7.🧺 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 flat table (d) a round pencil
8. 8.⚖️ 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) False (b) True
9. 9.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
11. 11.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a well pulley (d) a bottle opener
12. 12.⚖️ 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 measure it (c) we change it
13. 13.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
15. 15.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a doorknob (d) a spoon lifting a lid
16. 16.⚖️ 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
17. 17.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
18. 18.True or false: a sloping road is an inclined plane. (a) True (b) False
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) yeast
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
21. 21.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
23. 23.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
24. 24.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
25. 25.True or false: a doorknob is a wheel and axle. (a) True (b) False
26. 26.True or false: a slide is an inclined plane. (a) False (b) True
27. 27.True or false: a bottle opener is a lever. (a) True (b) False
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) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a balloon
30. 30.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
31. 31.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
32. 32.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
33. 33.⚖️ 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 keep it the same (b) we change it (c) we measure it
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) the right side (c) both go up (d) neither, it balances
35. 35.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
36. 36.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crowbar (c) a tap handle (d) a flagpole
37. 37.🧺 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 flat table (d) turmeric powder
38. 38.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
39. 39.⚙️ Which of these uses a pulley? (a) a ramp (b) a crane (c) a spoon lifting a lid (d) a tap handle
40. 40.⚖️ 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

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids