Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 626 · 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.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a magnet (c) a sunny window (d) turmeric powder
2. 2.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns brighter (d) it turns all red
3. 3.🛟 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
4. 4.🌈 How many colours do we name in a rainbow (VIBGYOR)?
5. 5.🌈 In VIBGYOR, what number colour is indigo?
6. 6.⚖️ 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
7. 7.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) orange (c) violet (d) red
8. 8.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) violet (c) blue (d) red
9. 9.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a balloon (c) a sunny window (d) bright sunlight
10. 10.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
11. 11.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
12. 12.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) clouds (c) balloons (d) prisms
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 measure it (b) we change it (c) we keep it the same
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is the one thing we change. (a) False (b) True
15. 15.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) a balloon (d) a sunny window
16. 16.⚖️ 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 window (b) the same glass (c) the time of day (d) the amount of water
17. 17.True or false: yeast is needed for the water rainbow. (a) False (b) True
18. 18.🧺 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 battery cell (d) a sheet of white paper
19. 19.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
20. 20.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) behind you (c) under the ground (d) in front of you
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the water rainbow? (a) yeast (b) a clear glass of water (c) a sunny window (d) a sheet of white paper
23. 23.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a clear glass of water (c) a magnet (d) a sheet of white paper
24. 24.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a mirror (c) a sunny window (d) bright sunlight
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) never look at the Sun (c) look at it in a mirror (d) look at it through glass
29. 29.⚖️ 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
30. 30.🌈 In VIBGYOR, what number colour is blue?
31. 31.🧺 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) yeast (d) a sheet of white paper
32. 32.🌈 In VIBGYOR, what number colour is red?
33. 33.⚖️ 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
34. 34.True or false: a sheet of white paper 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? What do we do with “the time of day”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.⚖️ 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
37. 37.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
38. 38.🌈 In VIBGYOR, what number colour is violet?
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a sunny window (c) a magnet (d) bright sunlight
40. 40.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) only yellow light (c) many colours mixed (d) tiny drops of water

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