Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 934 · 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 glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
2. 2.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
3. 3.⚖️ 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) False (b) True
4. 4.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) magnetism (d) air pressure
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 keep it the same (b) we measure it (c) we change it
6. 6.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🧺 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 balloon (d) a towel
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
9. 9.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the water turns to ice (c) the card flies away (d) the glass breaks
10. 10.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
11. 11.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
12. 12.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a suction hook (d) a compass needle
13. 13.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to cool the glass (d) to grow plants
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) turmeric powder (d) a stiff postcard
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) how full the glass is (b) whether the card stays (c) the same card
16. 16.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is hot (d) the straw is magnetic
17. 17.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
20. 20.⚖️ 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
21. 21.⚖️ 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) True (b) False
22. 22.⚖️ 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 same glass (b) whether the card stays (c) the way we turn it (d) how full the glass is
23. 23.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a stiff postcard (d) a towel
24. 24.True or false: a magnetic chess set works by air pressure. (a) True (b) False
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a balloon (d) a towel
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a towel (d) a sink or a bucket
28. 28.🧺 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 stiff postcard
29. 29.⚖️ 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 way we turn it (b) how full the glass is (c) the same glass (d) whether the card stays
30. 30.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a suction hook (d) a drinking straw
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a magnet (d) a stiff postcard
32. 32.True or false: a medicine dropper works by air pressure. (a) True (b) False
33. 33.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.True or false: a magnetic chess set works by magnetism. (a) False (b) True
35. 35.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a glass of water (d) a balloon
37. 37.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a vacuum cleaner (c) a magnetic pin holder (d) a compass needle
38. 38.⚖️ 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
39. 39.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure

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