Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 255 · 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 works by magnetism? (a) a bicycle pump (b) a fridge magnet (c) a vacuum cleaner (d) a suction hook
2. 2.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the glass breaks (d) the card stays on
3. 3.🔮 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
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic chess set (c) a drinking straw (d) a suction hook
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a stiff postcard (d) a towel
8. 8.🥛 Which of these works by air pressure? (a) a compass needle (b) a bicycle pump (c) a magnetic chess set (d) a magnetic pin holder
9. 9.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a vacuum cleaner (d) a suction hook
10. 10.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) friction (d) air pressure
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) a sink or a bucket (d) a mirror
13. 13.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🛟 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
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a stiff postcard (d) yeast
17. 17.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a medicine dropper (d) a magnetic chess set
18. 18.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to grow plants (d) to cool the glass
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) a magnet
20. 20.⚖️ 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) how full the glass is (b) whether the card stays (c) the same glass
21. 21.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🛟 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
25. 25.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.⚖️ 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) True (b) False
28. 28.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a magnetic chess set (d) a medicine dropper
29. 29.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is magnetic (d) the straw is hot
31. 31.⚖️ 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) True (b) False
32. 32.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.True or false: a medicine dropper works by air pressure. (a) False (b) True
34. 34.⚖️ 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 kept the same. (a) False (b) True
35. 35.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
37. 37.⚖️ 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
38. 38.True or false: a compass needle works by air pressure. (a) False (b) True
39. 39.🧺 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) turmeric powder (d) a stiff postcard
40. 40.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed

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