Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 421 · 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.⚖️ 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
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) yeast
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a towel (d) a stiff postcard
5. 5.⚖️ 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
6. 6.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a bicycle pump (c) a magnetic pin holder (d) a vacuum cleaner
7. 7.True or false: a drinking straw works by magnetism. (a) True (b) False
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a towel (d) a stiff postcard
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) a towel (d) a balloon
10. 10.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
11. 11.⚖️ 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) whether the card stays (c) the way we turn it (d) how full the glass is
12. 12.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a fridge magnet (d) a compass needle
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) a magnet
15. 15.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a bicycle pump
16. 16.⚖️ 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
17. 17.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a medicine dropper (d) a magnetic pin holder
20. 20.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) friction (c) sunlight (d) magnetism
21. 21.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a magnetic pin holder (d) a fridge magnet
23. 23.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the card stays on (d) the glass breaks
25. 25.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a suction hook (d) a drinking straw
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
28. 28.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
30. 30.⚖️ 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 change it (b) we keep it the same (c) we measure it
31. 31.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) a balloon
33. 33.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) a stiff postcard (d) a magnet
35. 35.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a suction hook (d) a compass needle
36. 36.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills

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