Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 110 · 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? Which of these is kept the same? (a) the same card (b) how full the glass is (c) whether the card stays
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) the cap is sticky (d) water is hiding there
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a mirror (d) a stiff postcard
4. 4.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a suction hook (d) a magnetic pin holder
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is the one thing we change. (a) False (b) True
7. 7.True or false: a drinking straw works by magnetism. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a fridge magnet (d) a compass needle
9. 9.True or false: a bicycle pump works by magnetism. (a) False (b) True
10. 10.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to make it rain (d) to grow plants
12. 12.True or false: a drinking straw works by air pressure. (a) True (b) False
13. 13.🥛 Which of these works by air pressure? (a) a compass needle (b) a bicycle pump (c) a fridge magnet (d) a magnetic chess set
14. 14.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.🧺 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 mirror (d) a stiff postcard
18. 18.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) how full the glass is (c) the same glass
23. 23.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a magnetic pin holder (d) a medicine dropper
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
25. 25.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
26. 26.🛟 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
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a medicine dropper (d) a suction hook
29. 29.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a bicycle pump (b) a medicine dropper (c) a suction hook (d) a magnetic chess set
31. 31.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a vacuum cleaner (d) a bicycle pump
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.⚖️ 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 kept the same. (a) False (b) True
36. 36.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) little air left inside (d) the card gets wet
37. 37.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) friction (d) sunlight
38. 38.🛟 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
39. 39.⚖️ 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 the one thing we change. (a) True (b) False
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) yeast (d) a glass of water

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