Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 409 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) two chairs (c) a magnet (d) a long string
2. 2.🧺 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) yeast (d) a sink or a bucket
3. 3.🧺 Which of these is not needed for the water cycle bowl? (a) a big bowl (b) yeast (c) sunlight (d) cling film
4. 4.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the stem turns to ice (c) the water turns green (d) the flower floats away
5. 5.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it in a mirror (c) stare at the Sun (d) look at it through glass
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.💧 Which change is this: a pond icing over? (a) evaporation (b) condensation (c) freezing (d) melting
8. 8.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to catch any spills (d) to make it rain
9. 9.🧊 Why does an ice cube float on water? (a) water is sticky (b) ice is magnetic (c) ice is very cold (d) ice is less dense
10. 10.🚁 Dropped from a raised hand, does a stone fall slowly or fast? (a) falls slowly (b) falls fast
11. 11.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is what we measure. (a) True (b) False
13. 13.🧺 Which of these is needed for the density tower? (a) a mirror (b) yeast (c) a balloon (d) cooking oil
14. 14.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) small test objects (c) a mirror (d) yeast
16. 16.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the flower glows (c) the stem turns blue (d) no colour change
17. 17.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) turmeric powder (d) a clear glass of water
18. 18.🧺 Do we need turmeric powder for the density tower? (a) not needed (b) needed
19. 19.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) vinegar (c) turmeric powder (d) a drinking straw
20. 20.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
23. 23.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes backward (b) goes forward
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 change it (b) we keep it the same (c) we measure it
25. 25.🚁 Which of these falls slowly through the air? (a) a glass marble (b) a crumpled paper ball (c) a toy parachute (d) a steel spoon
26. 26.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a magnet (c) a results table (d) small test objects
27. 27.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil attracts magnets (c) spilled oil is slippery (d) oil turns into honey
28. 28.🚀 Which of these goes forward? (a) the swimmer (b) air from the balloon (c) water from the oars (d) water a swimmer pushes
29. 29.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
30. 30.⚖️ 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 change it (c) we measure it
31. 31.🥄 Why does sugar dissolve faster in warm water? (a) particles move faster (b) warm water is thicker (c) sugar likes the dark (d) cold water is wet
32. 32.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is the one thing we change. (a) True (b) False
35. 35.🔍 How can you get the salt back from salty water? (a) keep it in a fridge (b) stir it more (c) add more water (d) let the water evaporate
36. 36.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they fall off at once (c) they all turn green (d) they stay white
37. 37.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) wipe up spills at once (c) play near a deep pond (d) leave water on the floor
38. 38.True or false: a flower stem does not let water climb. (a) True (b) False
39. 39.🥄 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) brightness of rainbow (b) the amount of water (c) the time of day (d) the same window

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