Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 928 · 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.⚖️ 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) False (b) True
2. 2.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
3. 3.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
5. 5.⚖️ 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) whether the card stays (b) how full the glass is (c) the way we turn it
6. 6.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
7. 7.🛟 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
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
9. 9.⚖️ 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
10. 10.⚖️ 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) how full the glass is (d) whether the card stays
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) a glass of water (d) a towel
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a towel (d) a stiff postcard
13. 13.🔍 Which is the odd one out? (a) a bicycle pump (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
14. 14.True or false: a fridge magnet works by air pressure. (a) True (b) False
15. 15.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
16. 16.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a bicycle pump
17. 17.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) a magnet (d) yeast
22. 22.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) sunlight (d) air pressure
23. 23.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.⚖️ 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
26. 26.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
30. 30.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) a magnet (d) turmeric powder
33. 33.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🔍 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 glass breaks (d) the card flies away
36. 36.True or false: a drinking straw works by air pressure. (a) False (b) True
37. 37.True or false: a medicine dropper works by magnetism. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a vacuum cleaner
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) a sink or a bucket (d) a towel
40. 40.True or false: a compass needle works by magnetism. (a) False (b) True

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