Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 53 · 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 what we measure. (a) True (b) False
2. 2.🥤 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
3. 3.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a stiff postcard (d) a battery cell
5. 5.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a drinking straw
6. 6.🔍 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 water turns to ice (c) the glass breaks (d) the card stays on
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) a towel (d) a stiff postcard
8. 8.⚖️ 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) True (b) False
9. 9.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.True or false: a drinking straw works by air pressure. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a suction hook (d) a magnetic pin holder
12. 12.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic pin holder (c) a drinking straw (d) a vacuum cleaner
13. 13.⚖️ 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 glass (b) whether the card stays (c) the way we turn it (d) the same card
14. 14.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a medicine dropper (c) a fridge magnet (d) a magnetic chess set
15. 15.True or false: a bicycle pump works by magnetism. (a) True (b) False
16. 16.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.⚖️ 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) how full the glass is (c) the way we turn it
18. 18.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a compass needle (d) a bicycle pump
19. 19.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
20. 20.🥛 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
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 the one thing we change. (a) True (b) False
22. 22.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
23. 23.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) a sink or a bucket (d) yeast
27. 27.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
28. 28.🧺 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) a stiff postcard (d) a magnet
29. 29.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
30. 30.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a sink or a bucket (d) a stiff postcard
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a balloon (d) a sink or a bucket
34. 34.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a drinking straw (d) a bicycle pump
35. 35.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.True or false: a suction hook works by magnetism. (a) False (b) True
37. 37.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a drinking straw
39. 39.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.⚖️ 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 measure it (c) we change it

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