Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 520 · 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) air pushes it up (b) juice likes plastic (c) the straw is magnetic (d) the straw is hot
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.🔍 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 glass breaks (c) the card stays on (d) the water turns to ice
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it will not break (d) it is hotter
5. 5.🧺 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 sink or a bucket
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a sink or a bucket (d) a stiff postcard
9. 9.True or false: a fridge magnet works by magnetism. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a medicine dropper
11. 11.🧺 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 balloon (d) a stiff postcard
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) yeast (d) turmeric powder
13. 13.⚖️ 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) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same card
14. 14.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
15. 15.⚖️ 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
16. 16.⚖️ 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) False (b) True
17. 17.⚖️ 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) True (b) False
18. 18.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a medicine dropper (d) a bicycle pump
19. 19.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a vacuum cleaner (d) a fridge magnet
20. 20.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
21. 21.⚖️ 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
22. 22.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to cool the glass (d) to grow plants
24. 24.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a magnetic pin holder
26. 26.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
27. 27.⚖️ 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 card (b) the way we turn it (c) whether the card stays (d) the same glass
28. 28.True or false: a suction hook works by magnetism. (a) False (b) True
29. 29.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
30. 30.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a drinking straw (d) a compass needle
31. 31.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a battery cell (d) a towel
33. 33.⚖️ 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
34. 34.True or false: a bicycle pump works by magnetism. (a) False (b) True
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a balloon (d) yeast
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) turmeric powder (d) a towel
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a battery cell (d) a stiff postcard
38. 38.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a vacuum cleaner (d) a fridge magnet
40. 40.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed

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