Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 487 · 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 is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a magnet
2. 2.🧺 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 mirror (c) a glass of water (d) a stiff postcard
3. 3.🔮 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) the cap is sticky (d) air inside pushes back
4. 4.⚖️ 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
5. 5.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.⚖️ 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) how full the glass is (b) the same card (c) the same glass (d) whether the card stays
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
8. 8.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a bicycle pump (d) a compass needle
9. 9.True or false: a bicycle pump works by magnetism. (a) True (b) False
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a sink or a bucket (c) a glass of water (d) a stiff postcard
11. 11.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) over a laptop (d) near a plug point
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a glass of water (d) turmeric powder
14. 14.⚖️ 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) True (b) False
15. 15.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
18. 18.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a vacuum cleaner (c) a compass needle (d) a fridge magnet
19. 19.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.True or false: a suction hook works by magnetism. (a) True (b) False
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) yeast (c) turmeric powder (d) a battery cell
22. 22.⚖️ 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) the same card (c) the way we turn it (d) how full the glass is
23. 23.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
24. 24.🛟 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
25. 25.True or false: a compass needle works by magnetism. (a) False (b) True
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a glass of water (d) a stiff postcard
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 glass breaks (c) the water turns to ice (d) the card flies away
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a drinking straw
31. 31.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a magnetic chess set (d) a drinking straw
32. 32.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.⚖️ 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) False (b) True
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) a battery cell
36. 36.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a vacuum cleaner (d) a fridge magnet
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a towel (c) a stiff postcard (d) a glass of water
38. 38.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.⚖️ 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 the one thing we change. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a medicine dropper (d) a compass needle

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