Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 641 · 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 sunny window is not needed for the water rainbow. (a) False (b) True
2. 2.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
3. 3.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a balloon (d) a sheet of white paper
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 does not fall (b) so the Sun moves (c) so it gets hot (d) so it turns blue
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
8. 8.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) False (b) True
9. 9.⚖️ 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) brightness of rainbow (d) the amount of water
10. 10.🔮 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
11. 11.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
12. 12.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) a clear glass of water (c) bright sunlight (d) a sunny window
13. 13.⚖️ 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
14. 14.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) clouds (d) magnets
15. 15.True or false: a mirror is not needed for the water rainbow. (a) False (b) True
16. 16.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
17. 17.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) under the ground (c) straight above you (d) behind you
18. 18.⚖️ 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) True (b) False
19. 19.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a mirror (c) a balloon (d) bright sunlight
20. 20.⚖️ 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
21. 21.True or false: a mirror is needed for the water rainbow. (a) False (b) True
22. 22.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a sunny window (d) yeast
23. 23.True or false: yeast is needed for the water rainbow. (a) False (b) True
24. 24.🌈 In VIBGYOR, what number colour is red?
25. 25.⚖️ 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
26. 26.True or false: a battery cell 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 same white paper is the one thing we change. (a) True (b) False
28. 28.True or false: a balloon is needed for the water rainbow. (a) True (b) False
29. 29.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) look at it through glass (d) never look at the Sun
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is kept the same. (a) True (b) False
31. 31.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
32. 32.🌈 In VIBGYOR, what number colour is yellow?
33. 33.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) brightness of rainbow (b) the same glass (c) the same white paper (d) the same window
35. 35.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny bits of dust (c) tiny drops of water (d) many colours mixed
36. 36.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a clear glass of water (c) turmeric powder (d) a battery cell
37. 37.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
38. 38.🌈 In VIBGYOR, what number colour is indigo?
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) a clear glass of water (c) bright sunlight (d) a sheet of white paper

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