Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 775 · 40 questions

What you do (Bend and split): 1. Fill a clear glass with water and set it on a steady, sunny windowsill. 2. Put white paper on the floor where the sunlight passes through the glass. 3. Move the paper or glass slowly until a rainbow appears. 4. Never look straight at the Sun.

1. 1.🌈 How many colours do we name in a rainbow (VIBGYOR)?
2. 2.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
3. 3.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) the glass is painted (d) water splits the light
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a sunny window (c) bright sunlight (d) a clear glass of water
5. 5.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
6. 6.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) False (b) True
8. 8.🌈 In VIBGYOR, what number colour is blue?
9. 9.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a clear glass of water (c) yeast (d) a sheet of white paper
11. 11.True or false: yeast is needed for the water rainbow. (a) False (b) True
12. 12.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
13. 13.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) turmeric powder (c) a sunny window (d) bright sunlight
14. 14.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) a sheet of white paper (c) a sunny window (d) bright sunlight
15. 15.🌈 In VIBGYOR, what number colour is green?
16. 16.📘 What do we call light bending as it passes from air into water? (a) reflection (b) evaporation (c) magnetism (d) refraction
17. 17.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
18. 18.⚖️ 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 same white paper (c) the time of day (d) the amount of water
19. 19.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.☀️ What is white sunlight really made of? (a) only yellow light (b) many colours mixed (c) tiny drops of water (d) tiny bits of dust
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) True (b) False
22. 22.🌈 In VIBGYOR, what number colour is red?
23. 23.⚖️ 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
24. 24.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) False (b) True
25. 25.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) a balloon
26. 26.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
27. 27.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
28. 28.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) yeast (c) a clear glass of water (d) turmeric powder
29. 29.True or false: a balloon is needed for the water rainbow. (a) False (b) True
30. 30.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
31. 31.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) violet (b) red (c) orange (d) yellow
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) False (b) True
33. 33.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a magnet (c) a sheet of white paper (d) bright sunlight
34. 34.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
35. 35.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so it turns blue (d) so the Sun moves
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
38. 38.🧺 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) a magnet (d) bright sunlight
39. 39.⚖️ 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
40. 40.True or false: a magnet is not needed for the water rainbow. (a) False (b) True

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