Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 213 · 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 is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a drinking straw (d) a magnetic pin holder
2. 2.⚖️ 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 measure it (c) we change it
3. 3.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
5. 5.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a vacuum cleaner (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? Which of these is kept the same? (a) how full the glass is (b) whether the card stays (c) the same glass
8. 8.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a medicine dropper (c) a vacuum cleaner (d) a fridge magnet
9. 9.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) little air left inside (d) water is heavier
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
11. 11.🔍 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 card flies away (c) the card stays on (d) the glass breaks
12. 12.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a balloon
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a magnet (d) a battery cell
16. 16.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a drinking straw
17. 17.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.True or false: a bicycle pump works by magnetism. (a) True (b) False
19. 19.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a bicycle pump (c) a compass needle (d) a fridge magnet
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a glass of water (d) a towel
21. 21.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a compass needle (d) a suction hook
23. 23.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
24. 24.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.⚖️ 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 way we turn it (c) the same card (d) how full the glass is
27. 27.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
28. 28.🛟 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
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a glass of water (d) a sink or a bucket
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) yeast (d) a battery cell
31. 31.True or false: a magnetic chess set works by magnetism. (a) False (b) True
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) whether the card stays (b) the same card (c) the way we turn it (d) the same glass
33. 33.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
34. 34.True or false: a medicine dropper works by magnetism. (a) False (b) True
35. 35.🔮 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
36. 36.🧺 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 towel (d) a magnet
37. 37.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a magnet (d) a battery cell
40. 40.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True

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