Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 646 · 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.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
2. 2.🌈 How many colours do we name in a rainbow (VIBGYOR)?
3. 3.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
4. 4.⚖️ 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 amount of water (b) the same white paper (c) brightness of rainbow (d) the same window
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
7. 7.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) magnets (d) clouds
8. 8.⚖️ 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) True (b) False
9. 9.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) the glass is painted (d) water splits the light
10. 10.🔮 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) snow falling (d) a magnet
11. 11.True or false: a sunny window is not needed for the water rainbow. (a) False (b) True
12. 12.⚖️ 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) False (b) True
13. 13.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) reflection (c) refraction (d) magnetism
14. 14.⚖️ 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
15. 15.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it does not fall (d) so it gets hot
16. 16.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) bright sunlight (c) a battery cell (d) turmeric powder
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a balloon (c) a sunny window (d) a clear glass of water
19. 19.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
20. 20.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) it floats away (d) the rainbow fades
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a magnet
22. 22.🌈 In VIBGYOR, what number colour is orange?
23. 23.🌦️ 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
24. 24.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
25. 25.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a sunny window (c) a magnet (d) a mirror
26. 26.True or false: a balloon is needed for the water rainbow. (a) False (b) True
27. 27.⚖️ 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 window (b) brightness of rainbow (c) the amount of water
28. 28.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a mirror (c) a sheet of white paper (d) a sunny window
29. 29.⚖️ 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
30. 30.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
31. 31.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) green (c) blue (d) red
32. 32.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) turmeric powder (c) a sunny window (d) a sheet of white paper
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a mirror
34. 34.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
35. 35.🌈 In VIBGYOR, what number colour is violet?
36. 36.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) violet (c) yellow (d) orange
37. 37.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a clear glass of water (d) a mirror
40. 40.🌈 In VIBGYOR, what number colour is green?

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