Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 163 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) a magnet
2. 2.⚖️ 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) how full the glass is (b) whether the card stays (c) the same card
3. 3.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
5. 5.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
7. 7.True or false: a bicycle pump works by magnetism. (a) False (b) True
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
9. 9.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a mirror (d) a glass of water
11. 11.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
13. 13.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a sink or a bucket (d) a glass of water
15. 15.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
16. 16.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the glass breaks (d) the card stays on
18. 18.⚖️ 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 change it (c) we keep it the same
19. 19.True or false: a medicine dropper works by magnetism. (a) False (b) True
20. 20.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 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 battery cell (c) a towel (d) a glass of water
23. 23.⚖️ 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
24. 24.True or false: a compass needle works by magnetism. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a vacuum cleaner (d) a magnetic pin holder
26. 26.⚖️ 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) the same card (c) the way we turn it (d) the same glass
27. 27.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a fridge magnet (d) a medicine dropper
28. 28.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) glue on the card (d) the cold water
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 way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🥤 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
31. 31.True or false: a magnetic chess set works by air pressure. (a) True (b) False
32. 32.🧺 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 balloon (d) a glass of water
33. 33.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
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 change it (b) we measure it (c) we keep it the same
35. 35.🧺 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 sink or a bucket
36. 36.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays
37. 37.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
38. 38.🧺 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) yeast (d) a sink or a bucket
39. 39.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a fridge magnet (d) a drinking straw

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