Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 648 · 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.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the cap is sticky (d) the bottle is magnetic
2. 2.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a medicine dropper (d) a magnetic chess set
3. 3.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
4. 4.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a fridge magnet (c) a medicine dropper (d) a bicycle pump
5. 5.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a magnetic chess set (d) a compass needle
6. 6.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.⚖️ 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 card (b) whether the card stays (c) the same glass (d) the way we turn it
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a glass of water (d) a stiff postcard
9. 9.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a suction hook (d) a vacuum cleaner
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a balloon (d) a magnet
11. 11.🧺 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 sink or a bucket (d) a mirror
12. 12.⚖️ 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
13. 13.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🔍 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
18. 18.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a battery cell (d) a mirror
20. 20.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a bicycle pump (d) a vacuum cleaner
21. 21.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
23. 23.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
25. 25.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a balloon (d) a sink or a bucket
28. 28.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a towel (d) a stiff postcard
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) yeast (c) a towel (d) turmeric powder
32. 32.🥛 Which of these works by air pressure? (a) a compass needle (b) a drinking straw (c) a fridge magnet (d) a magnetic chess set
33. 33.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
34. 34.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.⚖️ 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 way we turn it
36. 36.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a bicycle pump
37. 37.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
38. 38.⚖️ 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 card (b) whether the card stays (c) the way we turn it (d) how full the glass is
39. 39.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False

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