Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 239 · 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.⚖️ 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
2. 2.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.⚖️ 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) False (b) True
4. 4.🧺 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 sink or a bucket (d) a magnet
5. 5.🔍 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
6. 6.True or false: a bicycle pump works by air pressure. (a) False (b) True
7. 7.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a magnetic pin holder (d) a fridge magnet
9. 9.True or false: a fridge magnet works by air pressure. (a) False (b) True
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a mirror (d) yeast
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
12. 12.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a magnetic chess set
13. 13.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a drinking straw
15. 15.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
17. 17.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a suction hook (c) a vacuum cleaner (d) a drinking straw
20. 20.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a suction hook (c) a medicine dropper (d) a drinking straw
22. 22.🥛 Which of these works by air pressure? (a) a compass needle (b) a vacuum cleaner (c) a fridge magnet (d) a magnetic pin holder
23. 23.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a medicine dropper
24. 24.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) air pushing up (d) glue on the card
25. 25.⚖️ 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 way we turn it (b) how full the glass is (c) the same glass (d) whether the card stays
26. 26.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a compass needle (d) a vacuum cleaner
27. 27.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
28. 28.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
29. 29.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) air pushes it up (d) the straw is hot
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a balloon (d) a sink or a bucket
31. 31.⚖️ 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) how full the glass is (c) whether the card stays
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a stiff postcard (d) a towel
33. 33.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a medicine dropper (d) a suction hook
34. 34.True or false: a compass needle works by magnetism. (a) True (b) False
35. 35.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) turmeric powder (d) a towel
37. 37.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
38. 38.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a medicine dropper (d) a fridge magnet
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a mirror (d) a stiff postcard
40. 40.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand

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