Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 688 · 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 a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.True or false: a compass needle works by air pressure. (a) False (b) True
3. 3.⚖️ 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
4. 4.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🧺 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 sink or a bucket (d) a glass of water
6. 6.🧺 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 balloon
7. 7.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a drinking straw
8. 8.True or false: a magnetic chess set works by air pressure. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a magnetic chess set (d) a fridge magnet
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
11. 11.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
12. 12.⚖️ 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) how full the glass is (b) the same glass (c) the way we turn it (d) the same card
13. 13.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a drinking straw (d) a fridge magnet
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 card”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
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) the same glass (b) whether the card stays (c) how full the glass is
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
19. 19.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a stiff postcard (c) a towel (d) a glass of water
21. 21.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a vacuum cleaner (c) a fridge magnet (d) a magnetic chess set
23. 23.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a towel
25. 25.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a medicine dropper (d) a compass needle
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) turmeric powder
28. 28.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a glass of water (d) a sink or a bucket
31. 31.⚖️ 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) False (b) True
32. 32.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) the card gets wet (d) it looks nicer
33. 33.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.⚖️ 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
36. 36.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the card stays on (d) the glass breaks
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a battery cell (c) a balloon (d) a towel
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a balloon (d) a glass of water
40. 40.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False

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