Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 724 · 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.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a steering wheel (d) a crane
2. 2.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) yeast (d) a balloon
3. 3.⚖️ 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?
4. 4.⚖️ 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) the kind of coins (c) where the pencil is (d) which side goes down
5. 5.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
6. 6.⚖️ 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) True (b) False
7. 7.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
8. 8.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
9. 9.True or false: a steering wheel is a wheel and axle. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a round pencil (d) turmeric powder
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.🔮 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
14. 14.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a flat table (d) coins of one kind
16. 16.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a magnet (d) a round pencil
17. 17.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
19. 19.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a balloon (d) a magnet
20. 20.⚙️ Which of these is a wheel and axle? (a) a crane (b) a ramp (c) a well pulley (d) a steering wheel
21. 21.True or false: a bottle opener is a lever. (a) False (b) True
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
23. 23.⚙️ Which of these is a lever? (a) a crane (b) a crowbar (c) a ramp (d) a slide
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.True or false: a sloping road is a wheel and axle. (a) False (b) True
26. 26.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ 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) the number of coins (b) the same ruler (c) the kind of coins (d) distance from the pencil
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
31. 31.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
32. 32.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
33. 33.True or false: a flat table 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) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) the kind of coins (c) distance from the pencil
36. 36.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
37. 37.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
38. 38.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
39. 39.🛟 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
40. 40.⚖️ 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

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