Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 659 · 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 glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.🔮 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) the bottle is magnetic (d) water is hiding there
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a magnet
5. 5.🧺 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 battery cell (c) a stiff postcard (d) a glass of water
6. 6.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
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 change it (b) we keep it the same (c) we measure it
9. 9.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.True or false: a bicycle pump works by air pressure. (a) False (b) True
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a mirror (d) a towel
12. 12.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a vacuum cleaner (d) a magnetic pin holder
13. 13.⚖️ 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
14. 14.True or false: a suction hook works by air pressure. (a) True (b) False
15. 15.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) water (d) sand
18. 18.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to make it rain (d) to cool the glass
19. 19.🔍 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
20. 20.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
22. 22.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a medicine dropper
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.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a suction hook (d) a magnetic pin holder
25. 25.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) friction (d) sunlight
27. 27.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is magnetic (d) the straw is hot
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) turmeric powder
30. 30.⚖️ 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) False (b) True
31. 31.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a balloon
33. 33.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.True or false: a bicycle pump works by magnetism. (a) False (b) True
35. 35.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a glass of water (d) a mirror
38. 38.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a suction hook (b) a compass needle (c) a bicycle pump (d) a drinking straw

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