Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 338 · 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.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a battery cell (c) a towel (d) a sink or a bucket
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a stiff postcard (c) yeast (d) turmeric powder
3. 3.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a medicine dropper (d) a magnetic chess set
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic chess set
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a mirror (d) a magnet
7. 7.⚖️ 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 change it (c) we keep it the same
8. 8.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🛟 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
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
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 way we turn it (c) whether the card stays (d) the same card
12. 12.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) yeast (d) a glass of water
14. 14.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the water turns to ice (d) the glass breaks
16. 16.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a compass needle (d) a magnetic chess set
17. 17.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) a magnet (d) glue on the card
20. 20.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a compass needle
21. 21.⚖️ 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 what we measure. (a) False (b) True
22. 22.⚖️ 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) the way we turn it (b) whether the card stays (c) how full the glass is
23. 23.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) a balloon
27. 27.⚖️ 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) whether the card stays (b) how full the glass is (c) the same card (d) the way we turn it
28. 28.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) air inside pushes back (d) water is hiding there
29. 29.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.🧺 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 mirror (d) a towel
31. 31.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a battery cell (c) a stiff postcard (d) a sink or a bucket
33. 33.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a medicine dropper (c) a magnetic chess set (d) a fridge magnet
34. 34.⚖️ 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) the same glass (b) whether the card stays (c) how full the glass is
35. 35.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a towel (d) a glass of water
39. 39.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.🧺 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) yeast

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