Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 125 · 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.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
2. 2.⚖️ 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) False (b) True
3. 3.⚖️ 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 window (b) the same white paper (c) the time of day (d) the amount of water
4. 4.🌈 How many colours do we name in a rainbow (VIBGYOR)?
5. 5.🛟 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 does not fall (d) so it turns blue
6. 6.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) water splits the light (c) the water is coloured (d) the paper makes colours
7. 7.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
8. 8.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the same glass (c) the amount of water
9. 9.🧺 Do we need bright sunlight 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 clear glass of water (b) a balloon (c) a sunny window (d) a sheet of white paper
11. 11.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns all red (d) it turns brighter
12. 12.🌈 In VIBGYOR, what number colour is yellow?
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a battery cell (c) a sheet of white paper (d) a clear glass of water
14. 14.🌈 In VIBGYOR, what number colour is indigo?
15. 15.🌈 In VIBGYOR, what number colour is orange?
16. 16.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it in a mirror (c) look at it through glass (d) stare at the Sun
17. 17.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is what we measure. (a) False (b) True
18. 18.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
19. 19.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) many colours mixed (c) tiny drops of water (d) only yellow light
20. 20.⚖️ 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
21. 21.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
22. 22.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a battery cell (c) turmeric powder (d) a sunny window
23. 23.⚖️ 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 keep it the same (b) we measure it (c) we change it
24. 24.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
25. 25.🌈 In VIBGYOR, what number colour is blue?
26. 26.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is what we measure. (a) False (b) True
27. 27.🌈 In VIBGYOR, what number colour is green?
28. 28.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a shadow of ice (c) a magnet (d) snow falling
29. 29.🧺 Which of these is needed for the water rainbow? (a) yeast (b) bright sunlight (c) a balloon (d) a mirror
30. 30.True or false: a balloon is needed for the water rainbow. (a) False (b) True
31. 31.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
32. 32.⚖️ 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 change it (c) we measure it
33. 33.🧺 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 sheet of white paper (d) turmeric powder
34. 34.📘 What do we call light bending as it passes from air into water? (a) reflection (b) evaporation (c) refraction (d) magnetism
35. 35.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) in front of you (c) straight above you (d) under the ground
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is what we measure. (a) False (b) True
37. 37.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) violet (c) yellow (d) orange
38. 38.🌈 In VIBGYOR, what number colour is violet?
39. 39.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) clouds (c) balloons (d) magnets
40. 40.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) violet (c) green (d) red

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