Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 646 · 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.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
2. 2.⚖️ 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 keep it the same (c) we change it
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) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same glass
4. 4.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) air (d) water
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a fridge magnet (d) a drinking straw
7. 7.🔍 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 glass breaks (c) the card flies away (d) the card stays on
8. 8.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a compass needle (d) a fridge magnet
10. 10.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a compass needle (d) a vacuum cleaner
12. 12.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ 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
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
16. 16.⚖️ 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) the same glass (c) the same card (d) how full the glass is
17. 17.⚖️ 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 keep it the same (b) we measure it (c) we change it
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a sink or a bucket (d) a towel
19. 19.🧺 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 balloon (d) a stiff postcard
20. 20.True or false: a medicine dropper works by magnetism. (a) True (b) False
21. 21.⚖️ 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 card
22. 22.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
23. 23.⚖️ 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 keep it the same (b) we measure it (c) we change it
24. 24.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
25. 25.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.⚖️ 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) True (b) False
27. 27.⚖️ 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
28. 28.True or false: a compass needle works by magnetism. (a) False (b) True
29. 29.True or false: a drinking straw works by magnetism. (a) False (b) True
30. 30.True or false: a fridge magnet works by magnetism. (a) True (b) False
31. 31.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
35. 35.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.True or false: a fridge magnet works by air pressure. (a) True (b) False
37. 37.⚖️ 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
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a mirror (d) a glass of water
39. 39.True or false: a magnetic chess set works by air pressure. (a) True (b) False
40. 40.🧺 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) turmeric powder (d) a stiff postcard

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