Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 325 · 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.📘 What do we call light bending as it passes from air into water? (a) reflection (b) evaporation (c) magnetism (d) refraction
2. 2.🌈 How many colours do we name in a rainbow (VIBGYOR)?
3. 3.🌈 In VIBGYOR, what number colour is yellow?
4. 4.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny bits of dust (c) many colours mixed (d) tiny drops of water
5. 5.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
6. 6.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
7. 7.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it gets hot (c) so it turns blue (d) so the Sun moves
8. 8.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) never look at the Sun (c) look at it through glass (d) look at it in a mirror
9. 9.🌈 In VIBGYOR, what number colour is green?
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) brightness of rainbow (b) the same white paper (c) the same window (d) the amount of water
11. 11.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) bright sunlight (c) a clear glass of water (d) a balloon
12. 12.True or false: a magnet is needed for the water rainbow. (a) True (b) False
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) True (b) False
14. 14.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a magnet (d) a shadow of ice
15. 15.⚖️ 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
16. 16.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
17. 17.⚖️ 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) the amount of water (b) the same glass (c) brightness of rainbow (d) the same white paper
18. 18.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a clear glass of water (c) turmeric powder (d) yeast
19. 19.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
20. 20.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) turmeric powder (c) a sunny window (d) a clear glass of water
21. 21.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) yeast (c) a battery cell (d) bright sunlight
22. 22.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a battery cell (c) a magnet (d) a sheet of white paper
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
25. 25.🧺 Which of these is needed for the water rainbow? (a) a sunny window (b) a battery cell (c) yeast (d) a balloon
26. 26.⚖️ 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
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) yeast (c) a clear glass of water (d) a sunny window
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) brightness of rainbow (c) the same window
31. 31.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) behind you (c) straight above you (d) under the ground
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.True or false: a balloon is needed for the water rainbow. (a) False (b) True
36. 36.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
37. 37.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) False (b) True
38. 38.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) a clear glass of water (c) a sunny window (d) bright sunlight
39. 39.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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