Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 332 · 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.True or false: a tap handle is an inclined plane. (a) False (b) True
2. 2.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
3. 3.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
5. 5.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
6. 6.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
7. 7.🔮 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 left side (c) the right side (d) neither, it balances
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) turmeric powder
9. 9.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a mirror (d) a round pencil
11. 11.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
13. 13.⚖️ 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 change it (c) we keep it the same
14. 14.⚖️ 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 number of coins (b) distance from the pencil (c) the same ruler (d) which side goes down
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
16. 16.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
17. 17.⚙️ Which of these is a lever? (a) a bottle opener (b) a ramp (c) a crane (d) a slide
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
19. 19.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
20. 20.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
21. 21.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
22. 22.⚖️ 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 change it (c) we measure it
23. 23.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a battery cell (c) yeast (d) a magnet
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
25. 25.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
26. 26.⚖️ 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) True (b) False
27. 27.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
28. 28.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a doorknob (d) a crowbar
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) a 30 cm ruler (d) a flat table
30. 30.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
31. 31.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
32. 32.True or false: a slide is a wheel and axle. (a) False (b) True
33. 33.True or false: yeast is needed for the ruler lever. (a) True (b) False
34. 34.🧺 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) coins of one kind
35. 35.True or false: a well pulley uses a pulley. (a) False (b) True
36. 36.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a magnet (d) a 30 cm ruler
38. 38.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
39. 39.True or false: a crane is a lever. (a) False (b) True
40. 40.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crane (c) a bottle opener (d) a steering wheel

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