Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 217 · 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.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
2. 2.⚙️ Which of these uses a pulley? (a) a doorknob (b) a steering wheel (c) a sloping road (d) a flagpole
3. 3.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.⚖️ 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 same ruler (b) the number of coins (c) the kind of coins (d) distance from the pencil
6. 6.⚙️ Which of these is a lever? (a) a bottle opener (b) a flagpole (c) a doorknob (d) a ramp
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) coins of one kind
8. 8.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
10. 10.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit closer to middle (d) sit on the middle
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) yeast
12. 12.⚖️ 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 kind of coins (b) distance from the pencil (c) the same ruler (d) which side goes down
13. 13.⚖️ 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 keep it the same (c) we measure it
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
15. 15.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a sloping road (d) a see-saw
16. 16.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a spoon lifting a lid (d) a flagpole
17. 17.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
18. 18.True or false: a magnet is needed for the ruler lever. (a) True (b) False
19. 19.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
20. 20.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
21. 21.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crowbar (c) a see-saw (d) a doorknob
22. 22.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a tap handle (d) a spoon lifting a lid
23. 23.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a see-saw (c) a sloping road (d) a slide
24. 24.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) turmeric powder
26. 26.⚖️ 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
27. 27.⚖️ 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
28. 28.⚙️ Which of these uses a pulley? (a) a doorknob (b) a well pulley (c) a tap handle (d) a sloping road
29. 29.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
30. 30.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a flat table (d) a 30 cm ruler
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the lid gets softer (d) the spoon is hot
33. 33.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
34. 34.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a tap handle (c) a well pulley (d) a slide
35. 35.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ 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
37. 37.⚖️ 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) True (b) False
38. 38.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) a battery cell

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