Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 892 · 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.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
4. 4.True or false: a bicycle pump works by air pressure. (a) False (b) True
5. 5.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
8. 8.True or false: a magnetic chess set works by magnetism. (a) False (b) True
9. 9.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.⚖️ 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) the same card (c) how full the glass is (d) whether the card stays
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
12. 12.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
13. 13.True or false: a suction hook works by magnetism. (a) True (b) False
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) yeast (d) a towel
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a glass of water (c) turmeric powder (d) a balloon
16. 16.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
17. 17.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
18. 18.⚖️ 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) whether the card stays (b) the way we turn it (c) the same card (d) how full the glass is
19. 19.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a compass needle
20. 20.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a vacuum cleaner (c) a compass needle (d) a suction hook
22. 22.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the water turns to ice (c) the card flies away (d) the glass breaks
23. 23.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a vacuum cleaner (c) a bicycle pump (d) a medicine dropper
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 keep it the same (b) we measure it (c) we change it
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a magnet
28. 28.⚖️ 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 what we measure. (a) False (b) True
29. 29.True or false: a compass needle works by magnetism. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a vacuum cleaner (d) a compass needle
31. 31.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a sink or a bucket (d) a towel
34. 34.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a magnet
36. 36.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a balloon
38. 38.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
39. 39.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
40. 40.True or false: a drinking straw works by air pressure. (a) False (b) True

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