Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 954 · 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 blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
2. 2.⚖️ 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
3. 3.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
4. 4.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a drinking straw (d) a magnetic pin holder
5. 5.⚖️ 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 what we measure. (a) False (b) True
6. 6.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a mirror
8. 8.True or false: a drinking straw works by magnetism. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a suction hook (d) a drinking straw
10. 10.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.⚖️ 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 kept the same. (a) True (b) False
12. 12.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
13. 13.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
15. 15.⚖️ 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
16. 16.True or false: a suction hook works by magnetism. (a) False (b) True
17. 17.True or false: a suction hook works by air pressure. (a) False (b) True
18. 18.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🛟 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
20. 20.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🧺 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 magnet (d) a towel
24. 24.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a towel (c) a sink or a bucket (d) a glass of water
26. 26.⚖️ 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) the same card (b) the way we turn it (c) how full the glass is (d) the same glass
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a battery cell (d) a towel
28. 28.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
30. 30.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) over a laptop (d) on a bed
31. 31.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a vacuum cleaner (d) a magnetic pin holder
32. 32.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a drinking straw (c) a suction hook (d) a bicycle pump
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a sink or a bucket (c) a magnet (d) a battery cell
34. 34.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.🧺 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 sink or a bucket (d) a glass of water
36. 36.⚖️ 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) True (b) False
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
40. 40.True or false: a magnetic chess set works by air pressure. (a) True (b) False

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