Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 778 · 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.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.⚖️ 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) False (b) True
3. 3.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
4. 4.🧺 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 towel (d) turmeric powder
5. 5.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a glass of water (d) a stiff postcard
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.⚖️ 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) whether the card stays (b) how full the glass is (c) the same card (d) the same glass
9. 9.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
10. 10.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
12. 12.⚖️ 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
13. 13.⚖️ 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) whether the card stays (c) the same glass (d) how full the glass is
14. 14.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
15. 15.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a vacuum cleaner (d) a compass needle
16. 16.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
17. 17.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.⚖️ 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
19. 19.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.⚖️ 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
21. 21.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a vacuum cleaner (d) a magnetic chess set
22. 22.True or false: a compass needle works by magnetism. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
24. 24.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) yeast (d) a towel
28. 28.⚖️ 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 what we measure. (a) False (b) True
29. 29.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) a battery cell
33. 33.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
34. 34.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the water turns to ice (c) the glass breaks (d) the card flies away
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a stiff postcard (d) a sink or a bucket
36. 36.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.True or false: a bicycle pump works by magnetism. (a) False (b) True
38. 38.True or false: a compass needle works by air pressure. (a) False (b) True
39. 39.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a fridge magnet (c) a drinking straw (d) a vacuum cleaner
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a balloon (d) a stiff postcard

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