Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 294 · 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.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to cool the glass (d) to grow plants
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.🧺 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 sink or a bucket (d) a stiff postcard
4. 4.⚖️ 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) False (b) True
5. 5.⚖️ 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 glass (b) the same card (c) whether the card stays (d) how full the glass is
6. 6.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
7. 7.True or false: a magnetic chess set works by magnetism. (a) True (b) False
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) yeast (d) a stiff postcard
9. 9.🔍 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 flies away (c) the water turns to ice (d) the card stays on
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
11. 11.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) a battery cell
14. 14.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
20. 20.⚖️ 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) how full the glass is (b) whether the card stays (c) the same glass
21. 21.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
25. 25.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a suction hook (d) a fridge magnet
27. 27.⚖️ 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) whether the card stays (b) the same card (c) the same glass (d) the way we turn it
28. 28.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
32. 32.⚖️ 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) False (b) True
33. 33.⚖️ 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
34. 34.True or false: a compass needle works by air pressure. (a) False (b) True
35. 35.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.True or false: a bicycle pump works by magnetism. (a) True (b) False
40. 40.True or false: a suction hook works by air pressure. (a) False (b) True

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