Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 645 · 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 happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True
3. 3.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a balloon (b) a clear glass of water (c) bright sunlight (d) a sunny window
4. 4.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
5. 5.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) straight above you (c) under the ground (d) behind you
6. 6.⚖️ 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 amount of water (b) brightness of rainbow (c) the same glass (d) the same window
7. 7.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a sheet of white paper (c) bright sunlight (d) a sunny window
8. 8.☀️ What is white sunlight really made of? (a) tiny drops of water (b) tiny bits of dust (c) many colours mixed (d) only yellow light
9. 9.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a small rainbow (d) a shadow of ice
10. 10.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
11. 11.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
14. 14.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
15. 15.🌈 In VIBGYOR, what number colour is green?
16. 16.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
17. 17.🧺 Which of these is not needed for the water rainbow? (a) a battery cell (b) a sheet of white paper (c) a clear glass of water (d) a sunny window
18. 18.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the glass is painted (c) the water is coloured (d) the paper makes colours
19. 19.🌈 How many colours do we name in a rainbow (VIBGYOR)?
20. 20.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) violet (c) red (d) orange
21. 21.🌈 In VIBGYOR, what number colour is violet?
22. 22.⚖️ 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) the time of day (c) brightness of rainbow
23. 23.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
24. 24.⚖️ 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 time of day (b) the same white paper (c) the amount of water (d) the same glass
25. 25.🧺 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) a sheet of white paper (d) a magnet
26. 26.⚖️ 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
27. 27.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
30. 30.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
31. 31.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) a sunny window (d) yeast
32. 32.🌈 In VIBGYOR, what number colour is red?
33. 33.🛟 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
34. 34.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
35. 35.⚖️ 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
36. 36.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
37. 37.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) refraction (c) reflection (d) magnetism
38. 38.🌈 In VIBGYOR, what number colour is orange?
39. 39.⚖️ 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 measure it (b) we change it (c) we keep it the same
40. 40.True or false: a sunny window is needed for the water rainbow. (a) False (b) True

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