Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 344 · 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 stiff postcard (b) a towel (c) a magnet (d) a sink or a bucket
2. 2.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a magnetic pin holder (d) a vacuum cleaner
6. 6.⚖️ 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) the same card (c) the way we turn it (d) how full the glass is
7. 7.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
8. 8.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) yeast (d) a sink or a bucket
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a stiff postcard (d) a sink or a bucket
11. 11.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
13. 13.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
14. 14.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
15. 15.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a bicycle pump (d) a compass needle
16. 16.True or false: a suction hook works by air pressure. (a) False (b) True
17. 17.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.🧺 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 sink or a bucket (d) a mirror
19. 19.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a mirror (d) a towel
21. 21.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a drinking straw (d) a compass needle
22. 22.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.⚖️ 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 keep it the same (b) we change it (c) we measure it
28. 28.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.⚖️ 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) True (b) False
30. 30.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) the card gets wet (d) little air left inside
31. 31.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.True or false: a compass needle works by magnetism. (a) False (b) True
33. 33.True or false: a magnetic chess set works by magnetism. (a) True (b) False
34. 34.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
35. 35.⚖️ 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 same card (d) how full the glass is
36. 36.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
38. 38.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
39. 39.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a compass needle (d) a magnetic chess set

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids