Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 693 · 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.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a battery cell (d) a magnet
5. 5.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
6. 6.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is
7. 7.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a medicine dropper (d) a magnetic pin holder
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
9. 9.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.True or false: a bicycle pump works by magnetism. (a) True (b) False
11. 11.True or false: a medicine dropper works by air pressure. (a) True (b) False
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a glass of water (d) turmeric powder
13. 13.🧺 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 sink or a bucket (d) a glass of water
14. 14.⚖️ 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
15. 15.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
16. 16.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a fridge magnet (d) a suction hook
17. 17.⚖️ 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) the same glass (b) the same card (c) whether the card stays (d) how full the glass is
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a towel (c) a stiff postcard (d) a glass of water
19. 19.⚖️ 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 measure it (c) we keep it the same
20. 20.⚖️ 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
21. 21.🧺 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 towel (c) a glass of water (d) a mirror
22. 22.True or false: a magnetic chess set works by magnetism. (a) True (b) False
23. 23.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a medicine dropper
24. 24.🧺 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) yeast (d) a glass of water
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a stiff postcard (c) a glass of water (d) a towel
26. 26.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
27. 27.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) yeast
29. 29.⚖️ 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) False (b) True
30. 30.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
31. 31.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a suction hook (d) a magnetic chess set
32. 32.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a compass needle (d) a drinking straw
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a magnet (d) turmeric powder
35. 35.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🥛 Which of these works by magnetism? (a) a compass needle (b) a bicycle pump (c) a vacuum cleaner (d) a medicine dropper
37. 37.True or false: a suction hook works by air pressure. (a) False (b) True
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.⚖️ 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 the one thing we change. (a) True (b) False
40. 40.🧺 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 magnet (c) a towel (d) a glass of water

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