Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 545 · 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.🔮 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
2. 2.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.⚖️ 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) the way we turn it (b) whether the card stays (c) the same glass (d) how full the glass is
4. 4.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a medicine dropper
5. 5.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a glass of water (d) a towel
7. 7.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
9. 9.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a medicine dropper
10. 10.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a fridge magnet (d) a bicycle pump
11. 11.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a vacuum cleaner (c) a compass needle (d) a fridge magnet
13. 13.True or false: a suction hook works by magnetism. (a) False (b) True
14. 14.🧺 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 stiff postcard (d) a towel
15. 15.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
17. 17.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a drinking straw
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a sink or a bucket (c) a glass of water (d) a stiff postcard
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 magnetic chess set works by air pressure. (a) True (b) False
22. 22.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) a magnet (d) the cold water
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to cool the glass (d) to make it rain
24. 24.True or false: a drinking straw works by magnetism. (a) True (b) False
25. 25.⚖️ 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
26. 26.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
27. 27.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
29. 29.🧺 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) turmeric powder (d) a towel
30. 30.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
31. 31.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a vacuum cleaner (d) a compass needle
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a towel (c) a glass of water (d) a sink or a bucket
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a glass of water (d) a stiff postcard
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.True or false: a magnetic chess set works by magnetism. (a) True (b) False
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a magnet (d) turmeric powder
37. 37.🥛 Which of these works by air pressure? (a) a compass needle (b) a bicycle pump (c) a magnetic pin holder (d) a fridge magnet
38. 38.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
39. 39.🧺 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 mirror (d) a towel
40. 40.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed

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