Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 13 · 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 magnet (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
2. 2.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a stiff postcard (d) a towel
5. 5.⚖️ 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
6. 6.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a compass needle (d) a suction hook
9. 9.🧺 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 stiff postcard (d) a balloon
10. 10.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
11. 11.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a medicine dropper (d) a magnetic chess set
13. 13.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the card flies away (d) the water turns to ice
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 towel (c) a stiff postcard (d) a mirror
15. 15.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) turmeric powder (c) a stiff postcard (d) a glass of water
17. 17.⚖️ 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) the same card (c) how full the glass is (d) whether the card stays
18. 18.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a vacuum cleaner (d) a fridge magnet
19. 19.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
20. 20.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a magnet (d) a sink or a bucket
23. 23.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
24. 24.True or false: a medicine dropper works by magnetism. (a) False (b) True
25. 25.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a glass of water (d) a towel
27. 27.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
28. 28.⚖️ 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) False (b) True
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) yeast (c) a stiff postcard (d) a towel
30. 30.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) over a laptop (d) near a plug point
31. 31.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
32. 32.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a drinking straw
34. 34.⚖️ 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
35. 35.⚖️ 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) how full the glass is (b) the same card (c) the same glass (d) whether the card stays
36. 36.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a suction hook
37. 37.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
38. 38.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.True or false: a compass needle works by magnetism. (a) False (b) True

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