Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 422 · 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? True or false: the amount of water is the one thing we change. (a) False (b) True
2. 2.🧺 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) bright sunlight (d) turmeric powder
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) True (b) False
4. 4.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
5. 5.🌈 How many colours do we name in a rainbow (VIBGYOR)?
6. 6.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
7. 7.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) bright sunlight (c) a clear glass of water (d) a sunny window
8. 8.🧺 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 mirror (d) a sunny window
9. 9.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
10. 10.True or false: a sunny window is needed for the water rainbow. (a) True (b) False
11. 11.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the water is coloured (c) the paper makes colours (d) water splits the light
12. 12.⚖️ 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) brightness of rainbow (c) the time of day (d) the amount of water
13. 13.⚖️ 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
14. 14.True or false: a mirror is needed for the water rainbow. (a) True (b) False
15. 15.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a battery cell (d) a clear glass of water
16. 16.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) under the ground (c) behind you (d) straight above you
17. 17.🧺 Do we need yeast 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 what we measure? (a) the amount of water (b) the time of day (c) the same white paper (d) brightness of rainbow
19. 19.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a magnet (c) bright sunlight (d) a clear glass of water
20. 20.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a balloon (b) a clear glass of water (c) a sheet of white paper (d) a sunny window
21. 21.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) stare at the Sun (d) look at it through glass
22. 22.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
23. 23.🔮 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
24. 24.True or false: yeast is needed for the water rainbow. (a) False (b) True
25. 25.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) violet (c) orange (d) red
26. 26.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is the one thing we change. (a) False (b) True
28. 28.☀️ What is white sunlight really made of? (a) tiny drops of water (b) many colours mixed (c) only yellow light (d) tiny bits of dust
29. 29.⚖️ 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) True (b) False
30. 30.🌈 In VIBGYOR, what number colour is yellow?
31. 31.🌈 In VIBGYOR, what number colour is orange?
32. 32.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a magnet (c) bright sunlight (d) a battery cell
33. 33.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it turns blue (d) so it does not fall
34. 34.⚖️ 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
35. 35.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) refraction (c) evaporation (d) reflection
36. 36.⚖️ 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
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.🔮 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
39. 39.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
40. 40.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) turmeric powder (c) a sunny window (d) a sheet of white paper

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