Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 120 · 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.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
2. 2.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) the same three liquids (c) the order of the layers (d) the same glass
3. 3.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it floats away (c) it turns brighter (d) it turns all red
4. 4.🧺 Do we need a results table for the float-or-sink test? (a) needed (b) not needed
5. 5.🧺 Which of these is needed for the density tower? (a) a balloon (b) a tall clear glass (c) yeast (d) a battery cell
6. 6.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) ice cubes (c) turmeric powder (d) sunlight
7. 7.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) more friction, less far (c) it goes faster (d) no change at all
8. 8.True or false: honey is not needed for the density tower. (a) True (b) False
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a mirror (d) a towel
10. 10.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) time to reach the floor (b) the person dropping (c) the length of the blades (d) the paper clip
11. 11.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) cooking oil (c) turmeric powder (d) water with food colour
12. 12.True or false: a mirror is needed for the coloured flower experiment. (a) False (b) True
13. 13.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) the water increases (c) it turns to ice (d) some water evaporates
14. 14.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the water layer (c) on top of the oil (d) in the honey layer
15. 15.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) wash your hands (d) lick your fingers
16. 16.🌈 How many colours do we name in a rainbow (VIBGYOR)?
17. 17.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) yeast (c) turmeric powder (d) a sunny window
18. 18.💧 Which of these is evaporation? (a) making ice lollies (b) dew on morning grass (c) sweat drying on skin (d) a pond icing over
19. 19.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) anyone, without looking (d) a grown-up
20. 20.🧺 Do we need a balloon for the float-or-sink test? (a) not needed (b) needed
21. 21.True or false: a mirror is needed for the balloon rocket. (a) False (b) True
22. 22.⚖️ 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
23. 23.🛟 How should you check if the sugar has dissolved? (a) taste it (b) smell it closely (c) look for leftover grains (d) poke it with a finger
24. 24.🧺 Which of these is not needed for the density tower? (a) a magnet (b) a tall clear glass (c) cooking oil (d) water with food colour
25. 25.🚁 Which of these falls slowly through the air? (a) a coin (b) a feather (c) a steel spoon (d) a crumpled paper ball
26. 26.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is less dense (c) oil is heavier (d) oil is hot
27. 27.True or false: a balloon is needed for the density tower. (a) False (b) True
28. 28.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes forward (b) goes backward
29. 29.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a battery cell (b) water (c) ice cubes (d) sunlight
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) False (b) True
31. 31.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
32. 32.True or false: a paper clip is needed for the paper helicopter. (a) False (b) True
33. 33.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a mirror (c) a few hours of waiting (d) turmeric powder
34. 34.🌈 In VIBGYOR, what number colour is violet?
35. 35.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) a clear glass of water (d) a balloon
36. 36.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
37. 37.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it does not fall (c) so it gets hot (d) so the Sun moves
38. 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) time to dissolve (b) the water temperature (c) the stirring (d) the kind of sugar
39. 39.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
40. 40.True or false: a battery cell is needed for the water cycle bowl. (a) False (b) True

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