Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 530 · 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 suction hook works by air pressure. (a) True (b) False
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a mirror
3. 3.⚖️ 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
4. 4.⚖️ 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 kept the same. (a) True (b) False
5. 5.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🧺 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 towel (d) a magnet
7. 7.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
8. 8.⚖️ 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
9. 9.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is hot (d) the straw is magnetic
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a magnet (d) a balloon
11. 11.🧺 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) turmeric powder (d) a glass of water
12. 12.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a medicine dropper (d) a fridge magnet
14. 14.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
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 stiff postcard (c) a towel (d) a balloon
16. 16.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
17. 17.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) magnetism (d) air pressure
18. 18.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) sand (d) smoke
19. 19.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic pin holder (c) a vacuum cleaner (d) a drinking straw
20. 20.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a vacuum cleaner (d) a magnetic chess set
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a sink or a bucket (d) a towel
22. 22.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a battery cell (d) a stiff postcard
24. 24.⚖️ 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
25. 25.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a vacuum cleaner
26. 26.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.True or false: a compass needle works by magnetism. (a) False (b) True
28. 28.⚖️ 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
29. 29.True or false: a medicine dropper works by magnetism. (a) True (b) False
30. 30.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
32. 32.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.True or false: a mirror 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? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to cool the glass (d) to grow plants
36. 36.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a towel (d) a sink or a bucket
39. 39.🥛 Which of these works by magnetism? (a) a compass needle (b) a vacuum cleaner (c) a bicycle pump (d) a suction hook
40. 40.⚖️ 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 kept the same. (a) True (b) False

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