Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 739 · 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.⚖️ 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 measure it (c) we keep it the same
2. 2.🌈 In VIBGYOR, what number colour is orange?
3. 3.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) yeast (c) a clear glass of water (d) turmeric powder
4. 4.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) snow falling (c) a shadow of ice (d) a small rainbow
5. 5.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) violet (c) red (d) green
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the water is coloured (c) water splits the light (d) the glass is painted
8. 8.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
9. 9.🌈 In VIBGYOR, what number colour is red?
10. 10.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) the rainbow fades (c) it floats away (d) it turns all red
11. 11.☀️ What is white sunlight really made of? (a) tiny drops of water (b) only yellow light (c) tiny bits of dust (d) many colours mixed
12. 12.True or false: yeast is not needed for the water rainbow. (a) False (b) True
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a magnet (d) a clear glass of water
14. 14.🌈 In VIBGYOR, what number colour is violet?
15. 15.⚖️ 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 same white paper (b) the time of day (c) the same glass (d) the amount of water
16. 16.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
17. 17.⚖️ 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 keep it the same (b) we measure it (c) we change it
18. 18.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) yeast (c) a sheet of white paper (d) turmeric powder
21. 21.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) magnetism (c) reflection (d) refraction
22. 22.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) balloons (c) clouds (d) magnets
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same window (b) brightness of rainbow (c) the amount of water (d) the time of day
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.⚖️ 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 same white paper (b) brightness of rainbow (c) the amount of water
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) True (b) False
27. 27.🧺 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 sunny window (d) turmeric powder
28. 28.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
29. 29.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) yeast (c) a sheet of white paper (d) a sunny window
31. 31.⚖️ 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
32. 32.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
33. 33.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
34. 34.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so the Sun moves (c) so it turns blue (d) so it does not fall
35. 35.🌈 In VIBGYOR, what number colour is blue?
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.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) behind you (c) under the ground (d) in front of you
38. 38.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
39. 39.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
40. 40.🌈 In VIBGYOR, what number colour is green?

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