Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 711 · 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.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the glass breaks (c) the card stays on (d) the card flies away
2. 2.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a medicine dropper (d) a fridge magnet
3. 3.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a sink or a bucket (d) a towel
6. 6.True or false: a compass needle works by air pressure. (a) False (b) True
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
8. 8.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic pin holder (c) a suction hook (d) a drinking straw
9. 9.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a sink or a bucket (c) a towel (d) a stiff postcard
12. 12.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
13. 13.⚖️ 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
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) yeast (d) a stiff postcard
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 keep it the same (c) we change it
16. 16.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a magnetic pin holder
17. 17.⚖️ 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 kept the same. (a) True (b) False
18. 18.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
20. 20.⚖️ 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) True (b) False
21. 21.⚖️ 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) how full the glass is (c) the same card (d) the same glass
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder
24. 24.⚖️ 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 the one thing we change. (a) True (b) False
25. 25.🧺 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
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a magnet (d) a glass of water
27. 27.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🔮 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 grow plants (d) to cool the glass
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a battery cell (d) a stiff postcard
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 the one thing we change. (a) True (b) False
32. 32.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
33. 33.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
35. 35.⚖️ 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
36. 36.🔮 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) the cap is sticky (d) air inside pushes back
37. 37.🛟 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
38. 38.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a bicycle pump (d) a compass needle
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a mirror (d) a sink or a bucket
40. 40.True or false: a medicine dropper works by air pressure. (a) False (b) True

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