Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 66 · 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.⚖️ 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) whether the card stays (b) the same card (c) the way we turn it (d) how full the glass is
2. 2.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🔮 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
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a towel (d) a sink or a bucket
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a battery cell
6. 6.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
7. 7.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a bicycle pump
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) a magnet (d) a glass of water
9. 9.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a glass of water (d) a towel
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
12. 12.True or false: a drinking straw works by magnetism. (a) True (b) False
13. 13.True or false: a bicycle pump works by air pressure. (a) True (b) False
14. 14.🧺 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 magnet (d) a towel
15. 15.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.⚖️ 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) True (b) False
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a mirror (d) a glass of water
18. 18.True or false: a suction hook works by air pressure. (a) False (b) True
19. 19.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is hot (d) the straw is magnetic
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) air (d) sand
24. 24.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
25. 25.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) glue on the card (d) the cold water
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) how full the glass is (b) the way we turn it (c) whether the card stays (d) the same card
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 towel (d) a battery cell
28. 28.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a bicycle pump (d) a suction hook
29. 29.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a medicine dropper
31. 31.⚖️ 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) True (b) False
32. 32.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a suction hook (d) a fridge magnet
38. 38.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a medicine dropper (d) a compass needle
39. 39.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed

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