Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 167 · 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.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a suction hook (d) a fridge magnet
2. 2.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
3. 3.⚖️ 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) the same card (c) how full the glass is (d) whether the card stays
4. 4.⚖️ 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 same card
5. 5.True or false: a fridge magnet works by magnetism. (a) False (b) True
6. 6.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🛟 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
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
9. 9.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
10. 10.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a fridge magnet (d) a drinking straw
12. 12.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic pin holder (c) a suction hook (d) a vacuum cleaner
13. 13.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a vacuum cleaner
15. 15.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
16. 16.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
17. 17.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.🧺 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
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 card”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
23. 23.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) yeast
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
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) a towel (d) a balloon
26. 26.True or false: a suction hook works by magnetism. (a) True (b) False
27. 27.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) False (b) True
29. 29.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) the straw is magnetic (d) juice likes plastic
30. 30.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a vacuum cleaner
31. 31.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) little air left inside (d) water is heavier
32. 32.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a medicine dropper
33. 33.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🔮 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 bottle is magnetic (d) the cap is sticky
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a sink or a bucket (d) a glass of water
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a magnet (d) a stiff postcard
37. 37.True or false: a bicycle pump works by magnetism. (a) True (b) False
38. 38.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a drinking straw (d) a magnetic chess set
39. 39.🧺 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 mirror (d) a glass of water
40. 40.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True

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