Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 354 · 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 needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) a stiff postcard (d) turmeric powder
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 same glass”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a balloon
9. 9.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
10. 10.True or false: a suction hook works by air pressure. (a) False (b) True
11. 11.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
12. 12.🥛 Which of these works by magnetism? (a) a compass needle (b) a bicycle pump (c) a drinking straw (d) a vacuum cleaner
13. 13.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
14. 14.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🔍 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 stays on (d) the card flies away
16. 16.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a glass of water (c) a towel (d) a stiff postcard
19. 19.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
20. 20.⚖️ 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
21. 21.⚖️ 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) False (b) True
22. 22.⚖️ 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 card (b) whether the card stays (c) the same glass (d) how full the glass is
23. 23.⚖️ 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
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a magnet (d) a sink or a bucket
25. 25.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ 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
28. 28.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.⚖️ 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
30. 30.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
31. 31.True or false: a drinking straw works by magnetism. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a bicycle pump
33. 33.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
34. 34.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.🛟 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
36. 36.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a magnetic pin holder (d) a compass needle
38. 38.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🔮 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 cap is sticky (d) the bottle is magnetic
40. 40.🥛 Which of these works by magnetism? (a) a drinking straw (b) a magnetic pin holder (c) a suction hook (d) a medicine dropper

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