Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 799 · 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 of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a battery cell
2. 2.⚖️ 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
3. 3.🥛 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
4. 4.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🔍 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 card flies away (d) the water turns to ice
6. 6.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
7. 7.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a fridge magnet (d) a magnetic chess set
9. 9.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
10. 10.⚖️ 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) the same card (c) the way we turn it (d) whether the card stays
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a medicine dropper (d) a magnetic pin holder
13. 13.🛟 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 hotter (d) it is heavier
14. 14.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
15. 15.⚖️ 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) how full the glass is (c) the way we turn it (d) whether the card stays
16. 16.🛟 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
17. 17.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a balloon (d) a mirror
19. 19.⚖️ 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) True (b) False
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a fridge magnet (d) a magnetic chess set
24. 24.⚖️ 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 kept the same. (a) True (b) False
25. 25.⚖️ 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 keep it the same (c) we change it
26. 26.🧺 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
27. 27.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a bicycle pump (d) a fridge magnet
28. 28.⚖️ 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 same glass
29. 29.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
31. 31.True or false: a magnetic chess set works by magnetism. (a) False (b) True
32. 32.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a vacuum cleaner (c) a drinking straw (d) a compass needle
33. 33.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a vacuum cleaner
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 kept the same. (a) True (b) False
35. 35.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a balloon (c) a battery cell (d) a towel

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