Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 476 · 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.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
2. 2.🛟 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
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🧺 Do we need a stiff postcard 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 bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
8. 8.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a bicycle pump (c) a compass needle (d) a magnetic pin holder
9. 9.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a bicycle pump (d) a vacuum cleaner
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) turmeric powder (d) yeast
11. 11.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a magnetic pin holder (d) a medicine dropper
12. 12.True or false: a bicycle pump works by air pressure. (a) True (b) False
13. 13.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
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 towel (c) a magnet (d) a sink or a bucket
15. 15.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
17. 17.⚖️ 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 change it (c) we measure it
18. 18.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🔮 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
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a sink or a bucket (d) a towel
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a balloon (d) a stiff postcard
22. 22.🔍 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 card stays on (c) the card flies away (d) the glass breaks
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) turmeric powder (d) a towel
24. 24.True or false: a magnetic chess set works by magnetism. (a) True (b) False
25. 25.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a drinking straw (d) a compass needle
27. 27.⚖️ 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 same glass (c) the way we turn it (d) how full the glass is
28. 28.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.True or false: a suction hook works by air pressure. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
31. 31.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a suction hook (d) a medicine dropper
32. 32.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
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 change it (b) we measure it (c) we keep it the same
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.⚖️ 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) the way we turn it (c) how full the glass is
36. 36.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
37. 37.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.⚖️ 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) the same glass
40. 40.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) it looks nicer (d) water is heavier

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