Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 668 · 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 sink or a bucket 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? What do we do with “how full the glass is”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) True (b) False
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a drinking straw (d) a compass needle
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a stiff postcard (d) a glass of water
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a balloon (d) a mirror
8. 8.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.True or false: a bicycle pump works by magnetism. (a) False (b) True
10. 10.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a stiff postcard (d) a balloon
12. 12.True or false: a suction hook works by magnetism. (a) False (b) True
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a sink or a bucket (d) a towel
14. 14.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a medicine dropper
15. 15.True or false: a fridge magnet works by magnetism. (a) True (b) False
16. 16.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) the straw is hot (d) juice likes plastic
17. 17.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) magnetism (d) air pressure
19. 19.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a suction hook
20. 20.True or false: a fridge magnet works by air pressure. (a) True (b) False
21. 21.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) on a bed (d) near a plug point
22. 22.⚖️ 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
23. 23.⚖️ 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
24. 24.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🔍 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 glass breaks (d) the card stays on
26. 26.True or false: a drinking straw works by air pressure. (a) True (b) False
27. 27.True or false: a medicine dropper works by air pressure. (a) True (b) False
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a battery cell (c) a sink or a bucket (d) a glass of water
29. 29.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
31. 31.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🧺 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 mirror (d) a sink or a bucket
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a magnet (d) a sink or a bucket
35. 35.🔮 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
36. 36.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.True or false: a magnetic chess set works by air pressure. (a) True (b) False
38. 38.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a bicycle pump (d) a magnetic pin holder
39. 39.⚖️ 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
40. 40.🧺 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) yeast

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