Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 825 · 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.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a magnet (d) a battery cell
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a sink or a bucket (d) a glass of water
5. 5.⚖️ 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 way we turn it (b) how full the glass is (c) whether the card stays (d) the same glass
6. 6.True or false: a bicycle pump works by magnetism. (a) True (b) False
7. 7.True or false: a drinking straw works by air pressure. (a) True (b) False
8. 8.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
9. 9.⚖️ 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 kept the same. (a) True (b) False
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
11. 11.⚖️ 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) how full the glass is (b) the way we turn it (c) the same glass (d) whether the card stays
12. 12.⚖️ 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
13. 13.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) over a laptop (d) near a plug point
14. 14.⚖️ 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 measure it (c) we keep it the same
15. 15.⚖️ 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
16. 16.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a compass needle (d) a magnetic pin holder
18. 18.⚖️ 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) how full the glass is (b) whether the card stays (c) the way we turn it
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a glass of water (d) a balloon
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a towel (c) a sink or a bucket (d) a glass of water
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.⚖️ 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 change it (c) we measure it
23. 23.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a compass needle (d) a magnetic chess set
24. 24.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a sink or a bucket (d) a glass of water
28. 28.🧺 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 glass of water (d) a battery cell
29. 29.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a fridge magnet
30. 30.True or false: a drinking straw works by magnetism. (a) True (b) False
31. 31.True or false: a medicine dropper works by air pressure. (a) True (b) False
32. 32.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
34. 34.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
37. 37.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.True or false: a bicycle pump works by air pressure. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a medicine dropper (d) a compass needle
40. 40.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a suction hook (d) a medicine dropper

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