Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 49 · 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 wheel and axle? (a) a tap handle (b) a see-saw (c) a bottle opener (d) a sloping road
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
3. 3.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
4. 4.True or false: a bottle opener uses a pulley. (a) False (b) True
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) distance from the pencil (b) the kind of coins (c) the number of coins (d) the same ruler
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
8. 8.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.⚖️ 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) the spoon is magnetic (d) a lever boosts your push
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) a balloon (d) a round pencil
12. 12.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
13. 13.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down (d) the same ruler
14. 14.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
15. 15.True or false: a see-saw is a lever. (a) True (b) False
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.True or false: a steering wheel is a wheel and axle. (a) True (b) False
19. 19.⚖️ 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 change it (c) we measure it
20. 20.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
21. 21.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 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?
23. 23.True or false: turmeric powder is not 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: where the pencil is is the one thing we change. (a) True (b) False
25. 25.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
26. 26.⚖️ 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) where the pencil is (c) distance from the pencil
27. 27.True or false: yeast is not needed for the ruler lever. (a) False (b) True
28. 28.True or false: a balloon is needed for the ruler lever. (a) True (b) False
29. 29.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
30. 30.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a slide (d) a ramp
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the number of coins
32. 32.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
33. 33.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
34. 34.⚙️ Which simple machine is a crowbar? (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? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are too shiny (d) they are magnetic
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a magnet
38. 38.True or false: a mirror is needed for the ruler lever. (a) True (b) False
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) True (b) False
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?

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