Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 786 · 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 stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
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 same glass (b) how full the glass is (c) the same card (d) whether the card stays
3. 3.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) a magnet (d) glue on the card
4. 4.🧺 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 battery cell (d) a sink or a bucket
5. 5.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a drinking straw (d) a compass needle
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 what we measure. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a medicine dropper (d) a suction hook
8. 8.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🧺 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) turmeric powder (d) a towel
10. 10.🔍 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 stays on (c) the card flies away (d) the water turns to ice
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) yeast (d) a sink or a bucket
12. 12.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🧺 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 sink or a bucket
14. 14.⚖️ 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
15. 15.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) yeast (c) a balloon (d) a battery cell
17. 17.🧺 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 balloon (d) a stiff postcard
18. 18.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) on a bed (d) over a laptop
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) how full the glass is (c) the same card
20. 20.⚖️ 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
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a magnet (d) a glass of water
22. 22.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
23. 23.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
24. 24.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.⚖️ 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
26. 26.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
27. 27.⚖️ 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 measure it (c) we change it
28. 28.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
29. 29.⚖️ 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 measure it (b) we keep it the same (c) we change it
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a mirror (d) a magnet
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a towel (d) turmeric powder
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.⚖️ 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) True (b) False
36. 36.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
37. 37.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
38. 38.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) air inside pushes back (d) the bottle is magnetic
39. 39.True or false: a bicycle pump works by magnetism. (a) False (b) True
40. 40.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure

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