Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 607 · 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.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
2. 2.⚖️ 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 change it (b) we measure it (c) we keep it the same
3. 3.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a stiff postcard (d) a glass of water
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a balloon (d) a glass of water
6. 6.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
7. 7.🔍 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 water turns to ice (d) the glass breaks
8. 8.⚖️ 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) False (b) True
9. 9.🔮 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) water is hiding there (d) the bottle is magnetic
10. 10.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
12. 12.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a medicine dropper (d) a compass needle
13. 13.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
14. 14.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a medicine dropper (d) a suction hook
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a glass of water (d) a stiff postcard
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a sink or a bucket (d) a stiff postcard
17. 17.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) a balloon (d) turmeric powder
19. 19.🧺 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) a mirror
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a towel (d) a sink or a bucket
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a stiff postcard (d) a mirror
22. 22.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a magnetic pin holder (d) a compass needle
23. 23.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a vacuum cleaner
24. 24.⚖️ 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 the one thing we change. (a) True (b) False
25. 25.True or false: a drinking straw works by air pressure. (a) False (b) True
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 way we turn it”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.⚖️ 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 the one thing we change. (a) False (b) True
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a magnet
29. 29.🧺 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 battery cell
30. 30.⚖️ 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
31. 31.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a magnetic pin holder (d) a drinking straw
32. 32.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
37. 37.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a magnetic chess set (d) a vacuum cleaner

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