Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 592 · 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 blow up a balloon. What fills it? (a) sand (b) air (c) smoke (d) water
2. 2.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
3. 3.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a bicycle pump (c) a drinking straw (d) a suction hook
5. 5.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
8. 8.⚖️ 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) whether the card stays (c) the way we turn it (d) how full the glass is
9. 9.⚖️ 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
10. 10.🧺 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 towel (c) a glass of water (d) a mirror
11. 11.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a vacuum cleaner (c) a drinking straw (d) a bicycle pump
12. 12.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
13. 13.⚖️ 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) False (b) True
14. 14.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a medicine dropper (d) a vacuum cleaner
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a towel
16. 16.True or false: a medicine dropper works by air pressure. (a) True (b) False
17. 17.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.⚖️ 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 what we measure. (a) True (b) False
19. 19.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.⚖️ 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) the same glass (c) how full the glass is (d) the way we turn it
21. 21.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a drinking straw
22. 22.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
23. 23.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
24. 24.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) magnetism (d) air pressure
25. 25.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
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 same card”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a balloon
28. 28.True or false: a compass needle works by magnetism. (a) False (b) True
29. 29.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
30. 30.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
32. 32.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
33. 33.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
34. 34.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.True or false: a magnetic chess set works by air pressure. (a) False (b) True
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a glass of water (d) yeast
38. 38.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a bicycle pump (d) a medicine dropper
39. 39.🔍 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
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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