Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 647 · 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.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the bottle is magnetic (d) the cap is sticky
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a magnet (d) yeast
3. 3.True or false: a compass needle works by magnetism. (a) True (b) False
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a balloon
5. 5.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
7. 7.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a bicycle pump (d) a fridge magnet
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
9. 9.⚖️ 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
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) a stiff postcard (c) a balloon (d) a towel
11. 11.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a mirror
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) yeast (c) a glass of water (d) a sink or a bucket
14. 14.⚖️ 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) how full the glass is (b) the same card (c) whether the card stays (d) the way we turn it
15. 15.True or false: a compass needle works by air pressure. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a magnetic pin holder (d) a fridge magnet
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
18. 18.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
20. 20.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
22. 22.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) turmeric powder (c) a sink or a bucket (d) a stiff postcard
25. 25.🔍 Which is the odd one out? (a) a fridge magnet (b) a vacuum cleaner (c) a suction hook (d) a drinking straw
26. 26.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.🔍 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 card flies away (c) the glass breaks (d) the water turns to ice
28. 28.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a suction hook
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
31. 31.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) yeast
33. 33.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
34. 34.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.⚖️ 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 same card (b) the way we turn it (c) how full the glass is (d) whether the card stays
37. 37.⚖️ 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 way we turn it
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a mirror (d) a stiff postcard
39. 39.⚖️ 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
40. 40.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a fridge magnet (d) a vacuum cleaner

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