Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 716 · 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 paper helicopter. Which one is NOT needed? (a) safety scissors (b) a magnet (c) a strip of paper (d) a ruler
2. 2.💧 Which change is this: wet hair drying? (a) melting (b) freezing (c) evaporation (d) condensation
3. 3.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a magnet (c) turmeric powder (d) a mirror
4. 4.True or false: a medicine dropper works by air pressure. (a) False (b) True
5. 5.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
6. 6.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the card flies away (d) the water turns to ice
7. 7.True or false: a puddle drying up is freezing. (a) True (b) False
8. 8.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) vinegar (c) a drinking straw (d) a mirror
9. 9.🥄 Does sugar stirred well dissolve faster or slower? (a) faster (b) slower
10. 10.🧺 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
11. 11.🧺 Which of these is not needed for the coloured flower experiment? (a) turmeric powder (b) food colour (c) a few hours of waiting (d) a glass of water
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) table salt (d) small pebbles
14. 14.🧺 Do we need a mirror for the paper helicopter? (a) not needed (b) needed
15. 15.True or false: a cork sinks in water. (a) False (b) True
16. 16.🥄 Which of these dissolves in water? (a) cooking oil (b) baking soda (c) sawdust (d) sand
17. 17.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) water (c) yeast (d) a big bowl
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a balloon (d) a clear glass of water
19. 19.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) oil attracts magnets (d) spilled oil is slippery
21. 21.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
22. 22.⚖️ 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 same glass (d) how full the glass is
23. 23.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a magnet (c) sticky tape (d) a balloon
24. 24.True or false: sawdust does not dissolve in water. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a sugar cube (b) a flower stem (c) a piece of chalk (d) a steel spoon
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the stirring (b) the amount of sugar (c) time to dissolve (d) the water temperature
27. 27.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
28. 28.True or false: sugar stirred well dissolves faster. (a) False (b) True
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a sink or a bucket (d) a glass of water
30. 30.🧺 Do we need a mirror for the water cycle bowl? (a) not needed (b) needed
31. 31.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) faster (c) the same (d) not at all
32. 32.True or false: yeast is needed for the float-or-sink test. (a) True (b) False
33. 33.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it turns blue (c) it melts (d) it sinks
34. 34.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a magnetic pin holder (d) a suction hook
35. 35.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) run around the tub (c) wipe up spills at once (d) leave water on the floor
36. 36.💧 Which of these is evaporation? (a) dew on morning grass (b) snow turning to water (c) drops under a pot lid (d) sweat drying on skin
37. 37.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
38. 38.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) look for leftover grains (c) taste it (d) smell it closely
39. 39.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.True or false: a mirror is not needed for the water rainbow. (a) True (b) False

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