Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 856 · 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) turmeric powder (d) a sink or a bucket
2. 2.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic pin holder (c) a compass needle (d) a magnetic chess set
3. 3.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a fridge magnet (c) a vacuum cleaner (d) a suction hook
4. 4.🔮 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) water is hiding there (d) the cap is sticky
5. 5.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
6. 6.⚖️ 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
7. 7.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
8. 8.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
9. 9.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) air pushing up (d) glue on the card
10. 10.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a magnetic chess set (d) a bicycle pump
12. 12.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
15. 15.⚖️ 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
16. 16.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
17. 17.⚖️ 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
18. 18.🧺 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 glass of water
19. 19.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a balloon (d) a towel
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
24. 24.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
27. 27.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
29. 29.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.⚖️ 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
31. 31.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a medicine dropper
32. 32.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
34. 34.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a medicine dropper (c) a drinking straw (d) a bicycle pump
35. 35.🧺 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 glass of water (c) yeast (d) a towel
36. 36.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
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 glass”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (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 magnet (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
40. 40.🔍 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 stays on (d) the card flies away

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