Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 829 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
2. 2.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) coins of one kind (d) a balloon
3. 3.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the left side (d) the right side
4. 4.⚖️ 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
5. 5.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
6. 6.True or false: a steering wheel is a wheel and axle. (a) False (b) True
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the same ruler (d) distance from the pencil
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a mirror
10. 10.True or false: a doorknob is a wheel and axle. (a) False (b) True
11. 11.True or false: a tap handle is a lever. (a) True (b) False
12. 12.True or false: a spoon lifting a lid is a lever. (a) False (b) True
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) coins of one kind
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) turmeric powder (d) a flat table
16. 16.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are too shiny (d) they are magnetic
17. 17.⚖️ 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
18. 18.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a slide (d) a crane
19. 19.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
20. 20.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
21. 21.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
22. 22.🧺 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) a mirror
23. 23.⚖️ 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
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) a round pencil
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
27. 27.⚖️ 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 measure it (c) we keep it the same
28. 28.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
29. 29.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) a battery cell
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 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?
32. 32.⚖️ 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
33. 33.⚖️ 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
34. 34.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
36. 36.⚙️ Which of these is a lever? (a) a bottle opener (b) a flagpole (c) a slide (d) a sloping road
37. 37.⚖️ 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 hot (d) the spoon is magnetic
38. 38.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a crowbar is a lever. (a) False (b) True
40. 40.True or false: a bottle opener is a lever. (a) False (b) True

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