Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 996 · 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.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
4. 4.🧺 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
5. 5.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a medicine dropper (d) a suction hook
6. 6.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) juice likes plastic (d) air pushes it up
8. 8.⚖️ 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
9. 9.True or false: a medicine dropper works by air pressure. (a) False (b) True
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a balloon (d) a stiff postcard
11. 11.⚖️ 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) how full the glass is (b) the same card (c) the same glass (d) whether the card stays
12. 12.🧺 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) turmeric powder (d) a glass of water
13. 13.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🧺 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) a balloon (d) a sink or a bucket
15. 15.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
16. 16.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
17. 17.⚖️ 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) the same glass (c) how full the glass is
18. 18.⚖️ 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) True (b) False
19. 19.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
20. 20.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
24. 24.True or false: a suction hook works by air pressure. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a medicine dropper (d) a drinking straw
26. 26.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) friction (c) sunlight (d) magnetism
27. 27.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
28. 28.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.True or false: a drinking straw works by magnetism. (a) False (b) True
30. 30.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a stiff postcard (c) a mirror (d) a magnet
36. 36.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a balloon (d) turmeric powder
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔍 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 card flies away (c) the glass breaks (d) the card stays on
40. 40.⚖️ 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) False (b) True

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