Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 973 · 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.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
2. 2.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a suction hook (d) a drinking straw
5. 5.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
6. 6.⚖️ 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
7. 7.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) air pressure (c) friction (d) magnetism
9. 9.⚖️ 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) how full the glass is (c) the same card (d) whether the card stays
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) a magnet (d) a mirror
12. 12.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
13. 13.True or false: a fridge magnet works by air pressure. (a) False (b) True
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a towel (d) a glass of water
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a mirror (d) a towel
16. 16.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a drinking straw
18. 18.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🔮 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) water is hiding there (d) the bottle is magnetic
21. 21.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic chess set (c) a vacuum cleaner (d) a bicycle pump
24. 24.⚖️ 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 change it (b) we keep it the same (c) we measure it
25. 25.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a magnetic chess set (d) a vacuum cleaner
26. 26.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.⚖️ 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
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
29. 29.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
30. 30.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) turmeric powder (d) a sink or a bucket
33. 33.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.⚖️ 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 same card
35. 35.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
36. 36.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
37. 37.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a battery cell (c) a sink or a bucket (d) a stiff postcard
39. 39.True or false: a medicine dropper works by magnetism. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a compass needle (d) a fridge magnet

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