Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 349 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) turmeric powder (d) coins of one kind
2. 2.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a tap handle (c) a flagpole (d) a doorknob
3. 3.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
5. 5.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
6. 6.True or false: a magnet is needed for the ruler lever. (a) False (b) True
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
8. 8.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
9. 9.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
10. 10.⚙️ Which of these is a wheel and axle? (a) a crane (b) a tap handle (c) a flagpole (d) a slide
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a battery cell
12. 12.True or false: a crane is a wheel and axle. (a) False (b) True
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 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?
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
15. 15.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
16. 16.⚖️ 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) False (b) True
17. 17.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) a battery cell (d) a balloon
19. 19.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
20. 20.🛟 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
21. 21.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
22. 22.True or false: a tap handle is an inclined plane. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a see-saw (d) a crane
25. 25.⚖️ 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
26. 26.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
27. 27.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) turmeric powder (d) a 30 cm ruler
28. 28.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
29. 29.⚖️ 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 change it (b) we keep it the same (c) we measure it
30. 30.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a see-saw (d) a steering wheel
31. 31.⚖️ 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) False (b) True
32. 32.⚖️ 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) distance from the pencil (b) the same ruler (c) the kind of coins (d) which side goes down
33. 33.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
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) both go up (b) the left side (c) the right side (d) neither, it balances
35. 35.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a magnet
39. 39.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crane (c) a sloping road (d) a flagpole
40. 40.⚖️ 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

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