Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 649 · 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.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.⚖️ 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) the same glass (d) the same card
4. 4.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a stiff postcard (d) a towel
6. 6.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a suction hook (d) a drinking straw
8. 8.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) juice likes plastic (d) the straw is magnetic
9. 9.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
12. 12.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
13. 13.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
14. 14.⚖️ 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) True (b) False
15. 15.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.⚖️ 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
17. 17.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a drinking straw (d) a magnetic chess set
18. 18.⚖️ 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 what we measure. (a) True (b) False
19. 19.🧺 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 mirror (c) a stiff postcard (d) a glass of water
20. 20.True or false: a suction hook works by magnetism. (a) False (b) True
21. 21.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a medicine dropper (d) a fridge magnet
24. 24.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🔍 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 stays on (d) the card flies away
28. 28.True or false: a magnetic chess set works by air pressure. (a) False (b) True
29. 29.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a vacuum cleaner (d) a magnetic chess set
31. 31.⚖️ 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
32. 32.True or false: a suction hook works by air pressure. (a) False (b) True
33. 33.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
35. 35.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.⚖️ 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 glass
37. 37.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) it looks nicer (d) water is heavier
38. 38.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
39. 39.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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