Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 291 · 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.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) the straw is hot (d) air pushes it up
2. 2.⚖️ 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
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) air inside pushes back (d) water is hiding there
4. 4.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to cool the glass (d) to make it rain
5. 5.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) turmeric powder (d) a stiff postcard
7. 7.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a stiff postcard (d) a towel
10. 10.🧺 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) turmeric powder (d) a stiff postcard
11. 11.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a bicycle pump (d) a medicine dropper
12. 12.⚖️ 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 change it (b) we keep it the same (c) we measure it
13. 13.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a stiff postcard (d) a towel
15. 15.🛟 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
16. 16.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
17. 17.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a medicine dropper (d) a fridge magnet
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
19. 19.🥛 Which of these works by magnetism? (a) a suction hook (b) a fridge magnet (c) a drinking straw (d) a bicycle pump
20. 20.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
21. 21.⚖️ 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
22. 22.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a vacuum cleaner (c) a bicycle pump (d) a drinking straw
23. 23.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) air pressure (d) sunlight
24. 24.⚖️ 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
25. 25.⚖️ 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) True (b) False
26. 26.True or false: a suction hook works by air pressure. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a medicine dropper
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) False (b) True
29. 29.🔍 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 card stays on (c) the glass breaks (d) the water turns to ice
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a balloon (c) a towel (d) yeast
31. 31.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) it looks nicer (d) water is heavier
32. 32.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.True or false: a compass needle works by air pressure. (a) False (b) True
34. 34.True or false: a fridge magnet works by air pressure. (a) False (b) True
35. 35.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a vacuum cleaner (d) a fridge magnet
36. 36.🧺 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 towel (d) a battery cell
37. 37.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a towel (d) a glass of water
39. 39.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a vacuum cleaner (d) a fridge magnet

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