Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 874 · 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 vacuum cleaner works by air pressure. (a) True (b) False
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 way we turn it”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
4. 4.🔍 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 glass breaks (c) the card stays on (d) the water turns to ice
5. 5.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a medicine dropper (d) a magnetic chess set
6. 6.⚖️ 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
7. 7.🧺 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
8. 8.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a suction hook (d) a compass needle
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
10. 10.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a stiff postcard (d) yeast
13. 13.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.⚖️ 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) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same card
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a towel (d) yeast
16. 16.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) a battery cell (d) a balloon
18. 18.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a fridge magnet (d) a magnetic pin holder
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a mirror (d) a stiff postcard
21. 21.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a magnetic pin holder (d) a fridge magnet
22. 22.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a bicycle pump (d) a magnetic chess set
23. 23.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
25. 25.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a fridge magnet (d) a medicine dropper
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) yeast (d) a mirror
27. 27.🧺 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 stiff postcard (c) a glass of water (d) a magnet
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.🧺 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 stiff postcard (d) a battery cell
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a magnet
32. 32.🥛 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
33. 33.⚖️ 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) True (b) False
34. 34.⚖️ 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) how full the glass is (c) the same card (d) whether the card stays
35. 35.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
36. 36.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
38. 38.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🧺 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 balloon (d) a stiff postcard
40. 40.True or false: a magnetic pin holder works by magnetism. (a) True (b) False

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