Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 238 · 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.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) red (d) green
2. 2.🌈 In VIBGYOR, what number colour is indigo?
3. 3.🌈 In VIBGYOR, what number colour is green?
4. 4.⚖️ 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 measure it (b) we keep it the same (c) we change it
5. 5.⚖️ 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
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a battery cell (d) a sunny window
8. 8.☀️ What is white sunlight really made of? (a) many colours mixed (b) tiny bits of dust (c) tiny drops of water (d) only yellow light
9. 9.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a sunny window (d) a mirror
10. 10.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
11. 11.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a mirror (c) a balloon (d) bright sunlight
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) bright sunlight (d) a magnet
14. 14.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) bright sunlight (c) a clear glass of water (d) a sunny window
15. 15.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
16. 16.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
17. 17.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) yeast (d) a clear glass of water
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) True (b) False
19. 19.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) a mirror (d) bright sunlight
20. 20.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) evaporation (c) refraction (d) reflection
21. 21.⚖️ 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
22. 22.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) look at it in a mirror (d) never look at the Sun
23. 23.⚖️ 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) the amount of water (c) brightness of rainbow
24. 24.⚖️ 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 white paper (b) brightness of rainbow (c) the same window (d) the amount of water
25. 25.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
26. 26.True or false: a mirror is 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 amount of water is what we measure. (a) True (b) False
28. 28.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) violet (b) yellow (c) red (d) orange
29. 29.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it turns blue (c) so the Sun moves (d) so it gets hot
30. 30.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) a magnet (d) a clear glass of water
31. 31.True or false: a balloon is needed for the water rainbow. (a) True (b) False
32. 32.⚖️ 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) brightness of rainbow (c) the same white paper (d) the amount of water
33. 33.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) prisms (d) balloons
34. 34.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) water splits the light (d) the glass is painted
35. 35.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
36. 36.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
37. 37.⚖️ 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) True (b) False
38. 38.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) turmeric powder (c) a clear glass of water (d) bright sunlight
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) a clear glass of water (d) yeast
40. 40.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed

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