Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 929 · 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 see-saw is a lever. (a) True (b) False
2. 2.True or false: a magnet is needed for the ruler lever. (a) False (b) True
3. 3.⚖️ 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) False (b) True
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) where the pencil is (b) the number of coins (c) the same ruler (d) which side goes down
5. 5.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
6. 6.⚙️ Which of these uses a pulley? (a) a flagpole (b) a spoon lifting a lid (c) a slide (d) a bottle opener
7. 7.⚖️ 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
8. 8.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
9. 9.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) yeast (d) turmeric powder
10. 10.🔮 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 right side (c) the left side (d) neither, it balances
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) a round pencil
13. 13.⚙️ Which of these is a lever? (a) a tap handle (b) a well pulley (c) a crane (d) a see-saw
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
15. 15.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
16. 16.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
17. 17.True or false: a doorknob is a wheel and axle. (a) False (b) True
18. 18.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a steering wheel (c) a sloping road (d) a slide
19. 19.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
20. 20.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 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?
22. 22.True or false: a tap handle is a lever. (a) False (b) True
23. 23.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a tap handle (d) a crane
24. 24.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a sloping road (c) a flagpole (d) a doorknob
25. 25.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
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 the one thing we change. (a) False (b) True
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a battery cell
28. 28.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
29. 29.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) jump up and down (d) sit closer to middle
30. 30.⚖️ 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
31. 31.True or false: a ramp uses a pulley. (a) False (b) True
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) yeast
33. 33.⚖️ 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
34. 34.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
35. 35.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
36. 36.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
37. 37.⚙️ Which of these is an inclined plane? (a) a slide (b) a tap handle (c) a flagpole (d) a see-saw
38. 38.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
39. 39.⚙️ Which of these is a lever? (a) a tap handle (b) a sloping road (c) a spoon lifting a lid (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 “which side goes down”? (a) we keep it the same (b) we measure it (c) we change it

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