Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 952 · 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.🧺 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 magnet (d) a sink or a bucket
2. 2.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a balloon (d) a stiff postcard
5. 5.🥛 Which of these works by air pressure? (a) a compass needle (b) a vacuum cleaner (c) a magnetic chess set (d) a magnetic pin holder
6. 6.⚖️ 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) True (b) False
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
8. 8.🧺 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 glass of water (c) a balloon (d) a towel
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) turmeric powder
10. 10.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a medicine dropper (c) a drinking straw (d) a bicycle pump
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a stiff postcard (d) a towel
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.True or false: a medicine dropper works by air pressure. (a) True (b) False
15. 15.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.True or false: a medicine dropper works by magnetism. (a) True (b) False
18. 18.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
20. 20.⚖️ 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
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🛟 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
24. 24.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a fridge magnet
25. 25.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a vacuum cleaner (c) a drinking straw (d) a bicycle pump
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a stiff postcard (d) a battery cell
28. 28.⚖️ 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 same glass (b) the way we turn it (c) how full the glass is (d) whether the card stays
29. 29.🔍 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 glass breaks (c) the card flies away (d) the card stays on
30. 30.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a balloon (d) a towel
32. 32.⚖️ 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 same glass (c) how full the glass is (d) whether the card stays
33. 33.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a fridge magnet (d) a magnetic pin holder
36. 36.⚖️ 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) the same glass (c) whether the card stays
37. 37.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a sink or a bucket (d) turmeric powder
39. 39.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
40. 40.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a vacuum cleaner (d) a compass needle

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