Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 741 · 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.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.⚖️ 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) whether the card stays (c) the same glass (d) how full the glass is
3. 3.⚖️ 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) False (b) True
4. 4.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
6. 6.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
7. 7.⚖️ 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
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) yeast (c) a glass of water (d) a magnet
9. 9.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
10. 10.⚖️ 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 measure it (b) we keep it the same (c) we change it
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a balloon (d) a sink or a bucket
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a mirror (d) a balloon
14. 14.🧺 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) turmeric powder (d) a glass of water
15. 15.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a towel (d) turmeric powder
17. 17.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) air pressure (d) friction
18. 18.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a magnet (c) a sink or a bucket (d) a stiff postcard
20. 20.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) water (d) sand
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a sink or a bucket (d) a glass of water
22. 22.⚖️ 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 keep it the same (c) we measure it
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to make it rain (d) to grow plants
24. 24.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
27. 27.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🥛 Which of these works by magnetism? (a) a compass needle (b) a suction hook (c) a bicycle pump (d) a drinking straw
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a bicycle pump (d) a drinking straw
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 measure it (b) we keep it the same (c) we change it
31. 31.⚖️ 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) how full the glass is (b) whether the card stays (c) the way we turn it (d) the same card
32. 32.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on
33. 33.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) it looks nicer (d) water is heavier
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
38. 38.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.⚖️ 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 what we measure. (a) True (b) False

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