Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 568 · 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) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
2. 2.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a suction hook (d) a medicine dropper
3. 3.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
4. 4.⚖️ 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 card (b) how full the glass is (c) whether the card stays (d) the way we turn it
5. 5.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a drinking straw (d) a fridge magnet
6. 6.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.⚖️ 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 the one thing we change. (a) True (b) False
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a towel
9. 9.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
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 battery cell (d) a towel
11. 11.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a towel (d) a stiff postcard
13. 13.⚖️ 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
14. 14.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a drinking straw (d) a magnetic pin holder
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a towel (d) a stiff postcard
18. 18.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) on a bed (d) near a plug point
19. 19.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
20. 20.⚖️ 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 change it (c) we keep it the same
21. 21.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.⚖️ 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 change it (b) we keep it the same (c) we measure it
23. 23.⚖️ 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 glass (c) the same card (d) whether the card stays
24. 24.⚖️ 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 what we measure. (a) False (b) True
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a battery cell (d) a magnet
27. 27.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the card stays on (d) the glass breaks
28. 28.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.True or false: a magnetic chess set works by magnetism. (a) False (b) True
31. 31.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) a magnet (d) glue on the card
33. 33.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a vacuum cleaner (d) a fridge magnet
34. 34.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a stiff postcard (d) turmeric powder
38. 38.⚖️ 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 card (c) whether the card stays
39. 39.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a vacuum cleaner (d) a compass needle
40. 40.🧺 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 balloon (d) a sink or a bucket

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