Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 991 · 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.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a vacuum cleaner (c) a drinking straw (d) a bicycle pump
4. 4.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
5. 5.⚖️ 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 way we turn it (b) how full the glass is (c) the same card (d) whether the card stays
6. 6.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🔮 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) air inside pushes back (d) the bottle is magnetic
8. 8.⚖️ 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 keep it the same (b) we measure it (c) we change it
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) turmeric powder (d) a balloon
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a sink or a bucket (d) a stiff postcard
11. 11.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
13. 13.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a vacuum cleaner (d) a compass needle
15. 15.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
17. 17.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a towel (c) yeast (d) a mirror
19. 19.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a suction hook (d) a fridge magnet
20. 20.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
21. 21.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) turmeric powder
23. 23.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the glass breaks (c) the card flies away (d) the card stays on
24. 24.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a stiff postcard (d) a glass of water
26. 26.⚖️ 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
27. 27.True or false: a drinking straw works by magnetism. (a) False (b) True
28. 28.⚖️ 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 measure it (c) we change it
29. 29.True or false: a magnetic chess set works by magnetism. (a) True (b) False
30. 30.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a bicycle pump
31. 31.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.⚖️ 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
33. 33.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) water (d) sand
34. 34.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.⚖️ 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 change it (c) we keep it the same
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a towel (d) a sink or a bucket
38. 38.⚖️ 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 glass (d) how full the glass is
39. 39.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure

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