Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 594 · 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.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
5. 5.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) friction (c) sunlight (d) magnetism
8. 8.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
9. 9.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a magnetic pin holder
10. 10.⚖️ 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 what we measure. (a) True (b) False
11. 11.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a medicine dropper (c) a bicycle pump (d) a drinking straw
13. 13.⚖️ 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
14. 14.🧺 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) yeast (d) a towel
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
16. 16.True or false: a suction hook works by magnetism. (a) True (b) False
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
19. 19.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.⚖️ 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 keep it the same (c) we change it
21. 21.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a medicine dropper
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a battery cell (d) turmeric powder
23. 23.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a bicycle pump (c) a compass needle (d) a magnetic chess set
25. 25.🥛 Which of these works by air pressure? (a) a compass needle (b) a drinking straw (c) a fridge magnet (d) a magnetic chess set
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a stiff postcard (d) a towel
27. 27.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a medicine dropper (d) a compass needle
28. 28.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a bicycle pump (d) a suction hook
29. 29.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
31. 31.⚖️ 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) how full the glass is (b) the way we turn it (c) the same glass (d) the same card
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) a mirror (d) a balloon
33. 33.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on
36. 36.True or false: a compass needle works by air pressure. (a) True (b) False
37. 37.🔮 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
38. 38.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
39. 39.🥤 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
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a towel (c) a glass of water (d) a sink or a bucket

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