Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 512 · 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 not needed for the ruler lever? (a) yeast (b) a flat table (c) coins of one kind (d) a 30 cm ruler
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
3. 3.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
4. 4.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
5. 5.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
8. 8.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) yeast (d) a mirror
9. 9.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
10. 10.🧺 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 mirror
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
12. 12.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
15. 15.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
18. 18.🔮 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) the left side (c) both go up (d) the right side
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
20. 20.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a mirror (d) yeast
21. 21.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a steering wheel (c) a slide (d) a ramp
22. 22.⚖️ 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
23. 23.True or false: a mirror is needed for the ruler lever. (a) False (b) True
24. 24.⚖️ 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
25. 25.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
26. 26.⚖️ 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
27. 27.⚖️ 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?
28. 28.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
29. 29.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
30. 30.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
32. 32.⚙️ Which of these is a lever? (a) a doorknob (b) a tap handle (c) a crowbar (d) a steering wheel
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
34. 34.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.⚖️ 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 kind of coins (b) distance from the pencil (c) the number of coins (d) where the pencil is
36. 36.True or false: a tap handle uses a pulley. (a) True (b) False
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 round pencil (d) turmeric powder
38. 38.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
39. 39.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed

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