Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 990 · 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.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
4. 4.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
5. 5.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
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) False (b) True
8. 8.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
10. 10.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) yeast (d) turmeric powder
12. 12.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) near a plug point (d) over a laptop
13. 13.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a medicine dropper (d) a magnetic pin holder
14. 14.🧺 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) yeast
15. 15.⚖️ 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
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to grow plants (d) to make it rain
17. 17.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
18. 18.⚖️ 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) whether the card stays (c) how full the glass is (d) the same card
19. 19.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a glass of water (d) a sink or a bucket
21. 21.⚖️ 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 what we measure. (a) False (b) True
22. 22.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) the straw is magnetic (d) air pushes it up
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
25. 25.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.⚖️ 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 change it (b) we keep it the same (c) we measure it
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a bicycle pump (d) a magnetic chess set
31. 31.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
32. 32.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a bicycle pump (d) a compass needle
33. 33.True or false: a drinking straw works by magnetism. (a) False (b) True
34. 34.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a medicine dropper
36. 36.🔍 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 glass breaks (d) the card stays on
37. 37.True or false: a medicine dropper works by magnetism. (a) True (b) False
38. 38.True or false: a bicycle pump works by magnetism. (a) True (b) False
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 kept the same. (a) True (b) False
40. 40.True or false: a bicycle pump works by air pressure. (a) False (b) True

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