Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 77 · 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.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
2. 2.💧 Which change is this: making ice lollies? (a) melting (b) condensation (c) evaporation (d) freezing
3. 3.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) play near a deep pond (d) run around the tub
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the kind of flower
5. 5.🥄 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) the cap is sticky (d) water is hiding there
7. 7.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) turmeric powder (d) bright sunlight
8. 8.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) how many drops form (b) sun or shade (c) the time we wait
9. 9.True or false: small pebbles dissolves in water. (a) True (b) False
10. 10.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a sunny window (d) a magnet
11. 11.🔍 Which is the odd one out? (a) a paper towel (b) a strip of cloth (c) a piece of foil (d) a flower stem
12. 12.🥄 Why does sugar dissolve faster in warm water? (a) warm water is thicker (b) sugar likes the dark (c) cold water is wet (d) particles move faster
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🛟 Does a coin float or sink in water? (a) floats (b) sinks
15. 15.⚖️ 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) how full the glass is (d) the way we turn it
16. 16.🌈 How many colours do we name in a rainbow (VIBGYOR)?
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a towel
18. 18.📘 What is the push of air on a falling thing called? (a) dissolving (b) air resistance (c) magnetism (d) floating
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) time for colour to show (c) the amount of colour
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) poke it with a finger (d) smell it closely
22. 22.🌼 How does coloured water reach the petals? (a) through the air (b) it rains on them (c) through tiny stem tubes (d) it is sprayed on
23. 23.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
24. 24.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the kind of sugar (b) time to dissolve (c) the water temperature
25. 25.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) True (b) False
26. 26.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) throw them away safely (c) keep them in your mouth (d) chew them
27. 27.🚀 Which of these goes backward? (a) the rowing boat (b) the balloon (c) the rocket (d) water from the oars
28. 28.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) cling film (c) a balloon (d) ice cubes
30. 30.💧 Which change is this: dew on morning grass? (a) melting (b) freezing (c) evaporation (d) condensation
31. 31.True or false: ice becoming water is melting. (a) True (b) False
32. 32.True or false: a coin falls fast through the air. (a) False (b) True
33. 33.True or false: yeast is not needed for the water cycle bowl. (a) True (b) False
34. 34.🧺 Which of these is not needed for the coloured flower experiment? (a) a magnet (b) food colour (c) a few hours of waiting (d) a white flower
35. 35.🥄 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) nothing ever happens (c) it turns to plastic (d) colour climbs up it
40. 40.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed

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