Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 4 · 40 questions

What you do (Air pushes): 1. Fill a plastic glass right to the top with water. 2. Lay the postcard flat on top, covering the rim. 3. Over a sink or bucket, hold the card and turn the glass upside down. 4. Slowly take your hand away from the card and watch.

1. 1.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) turmeric powder (c) a battery cell (d) a towel
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same card (b) the same glass (c) the way we turn it (d) whether the card stays
4. 4.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a suction hook (d) a compass needle
5. 5.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a battery cell (d) a towel
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) yeast (d) a stiff postcard
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same glass (b) how full the glass is (c) the way we turn it (d) the same card
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a magnet
10. 10.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
11. 11.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a medicine dropper (d) a suction hook
13. 13.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) magnetism (d) air pressure
15. 15.True or false: a suction hook works by magnetism. (a) True (b) False
16. 16.True or false: a bicycle pump works by magnetism. (a) True (b) False
17. 17.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
18. 18.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
19. 19.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is what we measure. (a) True (b) False
27. 27.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) True (b) False
30. 30.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a sink or a bucket (d) a towel
32. 32.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
33. 33.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a fridge magnet (d) a drinking straw
35. 35.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a towel (c) a battery cell (d) a stiff postcard
38. 38.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True

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