Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 601 · 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) juice likes plastic (b) the straw is hot (c) air pushes it up (d) the straw is magnetic
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
3. 3.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
4. 4.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
5. 5.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a suction hook (c) a medicine dropper (d) a bicycle pump
6. 6.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) water is heavier (d) little air left inside
7. 7.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
8. 8.⚖️ 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) whether the card stays (b) the way we turn it (c) how full the glass is
9. 9.⚖️ 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) the same glass (b) the same card (c) the way we turn it (d) how full the glass is
10. 10.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
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 glass”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.⚖️ 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) whether the card stays (b) the way we turn it (c) how full the glass is (d) the same glass
15. 15.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
19. 19.🔍 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 stays on (c) the water turns to ice (d) the card flies away
20. 20.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
21. 21.⚖️ 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
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a balloon (d) turmeric powder
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
24. 24.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🧺 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 glass of water (c) yeast (d) a towel
26. 26.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.⚖️ 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 keep it the same (b) we change it (c) we measure it
28. 28.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.True or false: a suction hook works by magnetism. (a) True (b) False
30. 30.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
31. 31.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a magnet (d) a towel
35. 35.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) turmeric powder (d) yeast
37. 37.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
38. 38.⚖️ 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 change it (b) we keep it the same (c) we measure it
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a mirror
40. 40.🥛 Which of these works by air pressure? (a) a compass needle (b) a vacuum cleaner (c) a fridge magnet (d) a magnetic chess set

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