Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 785 · 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 magnet is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the bottle is magnetic (d) the cap is sticky
3. 3.🧺 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 magnet (d) a stiff postcard
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a glass of water (d) a sink or a bucket
5. 5.True or false: a drinking straw works by magnetism. (a) True (b) False
6. 6.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) yeast (c) a battery cell (d) a magnet
8. 8.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.⚖️ 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) whether the card stays (b) the same card (c) the same glass (d) how full the glass is
11. 11.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
13. 13.⚖️ 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
14. 14.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a fridge magnet (d) a vacuum cleaner
17. 17.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to cool the glass (d) to make it rain
20. 20.⚖️ 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
21. 21.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.True or false: a bicycle pump works by air pressure. (a) False (b) True
23. 23.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a compass needle (d) a vacuum cleaner
24. 24.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.⚖️ 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
26. 26.🥛 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
27. 27.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a towel (d) a magnet
29. 29.⚖️ 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 card (b) how full the glass is (c) whether the card stays (d) the same glass
30. 30.⚖️ 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 the one thing we change. (a) True (b) False
31. 31.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.True or false: a medicine dropper works by air pressure. (a) False (b) True
34. 34.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
35. 35.⚖️ 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 change it (c) we measure it
36. 36.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a battery cell (d) a sink or a bucket
38. 38.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a battery cell (d) a magnet
40. 40.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a drinking straw

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