Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 982 · 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) needed (b) not needed
2. 2.True or false: a suction hook works by air pressure. (a) True (b) False
3. 3.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
4. 4.True or false: a fridge magnet works by magnetism. (a) True (b) False
5. 5.⚖️ 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 measure it (c) we keep it the same
6. 6.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a balloon (d) a sink or a bucket
8. 8.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a magnetic pin holder (d) a magnetic chess set
9. 9.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) turmeric powder (c) a towel (d) a stiff postcard
11. 11.⚖️ 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 what we measure. (a) False (b) True
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) turmeric powder (d) a glass of water
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) the card gets wet (d) it looks nicer
16. 16.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) smoke (d) sand
17. 17.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
18. 18.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
19. 19.🔍 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
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a balloon
21. 21.⚖️ 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 way we turn it (b) the same card (c) whether the card stays (d) the same glass
22. 22.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
23. 23.🧺 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 mirror (d) a towel
24. 24.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
27. 27.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) air inside pushes back (d) the bottle is magnetic
28. 28.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a drinking straw (d) a medicine dropper
29. 29.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.True or false: a compass needle works by air pressure. (a) True (b) False
31. 31.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.True or false: a drinking straw works by magnetism. (a) False (b) True
34. 34.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.True or false: a medicine dropper works by air pressure. (a) False (b) True
36. 36.🧺 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 glass of water (d) a mirror
37. 37.⚖️ 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 kept the same. (a) True (b) False
38. 38.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) a magnet (d) a towel

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