Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 433 · 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 well pulley (b) a tap handle (c) a crane (d) a spoon lifting a lid
2. 2.🔮 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) the right side (c) both go up (d) neither, it balances
3. 3.⚖️ 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
4. 4.⚖️ 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
5. 5.True or false: a tap handle is a lever. (a) True (b) False
6. 6.⚖️ 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) which side goes down (b) where the pencil is (c) distance from the pencil (d) the kind of coins
7. 7.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a flagpole (d) a crane
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
9. 9.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
10. 10.True or false: a flat table is needed for the ruler lever. (a) False (b) True
11. 11.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
12. 12.⚖️ 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
13. 13.⚖️ 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 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? True or false: the number of coins is the one thing we change. (a) True (b) False
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🛟 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
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a round pencil (d) coins of one kind
18. 18.🧺 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 magnet (d) a 30 cm ruler
19. 19.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a spoon lifting a lid (d) a see-saw
20. 20.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
21. 21.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
22. 22.True or false: a mirror is needed for the ruler lever. (a) True (b) False
23. 23.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a slide (c) a crowbar (d) a doorknob
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
25. 25.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit on the middle (d) sit farther from middle
26. 26.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
27. 27.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
28. 28.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a see-saw is an inclined plane. (a) False (b) True
30. 30.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) turmeric powder (d) a mirror
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a balloon
32. 32.True or false: a steering wheel is a wheel and axle. (a) False (b) True
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 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?
34. 34.True or false: yeast is needed for the ruler lever. (a) False (b) True
35. 35.True or false: a bottle opener is a wheel and axle. (a) False (b) True
36. 36.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
37. 37.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a bottle opener (d) a crowbar
38. 38.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 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?

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