Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 680 · 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.🌈 How many colours do we name in a rainbow (VIBGYOR)?
2. 2.⚖️ 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 time of day (b) the same white paper (c) brightness of rainbow (d) the amount of water
3. 3.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) look at it in a mirror (d) stare at the Sun
4. 4.🌈 In VIBGYOR, what number colour is violet?
5. 5.🌈 In VIBGYOR, what number colour is orange?
6. 6.🔮 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) a magnet (d) snow falling
7. 7.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
8. 8.☀️ What is white sunlight really made of? (a) tiny drops of water (b) only yellow light (c) many colours mixed (d) tiny bits of dust
9. 9.⚖️ 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
10. 10.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so the Sun moves (c) so it does not fall (d) so it turns blue
11. 11.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
12. 12.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) under the ground (c) in front of you (d) behind you
13. 13.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) green (d) red
14. 14.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a sunny window (c) a sheet of white paper (d) a clear glass of water
15. 15.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.True or false: yeast is not needed for the water rainbow. (a) True (b) False
18. 18.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a magnet (c) yeast (d) a battery cell
19. 19.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) yeast (c) a sheet of white paper (d) a clear glass of water
20. 20.⚖️ 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
21. 21.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) clouds (d) prisms
22. 22.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
23. 23.🧺 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 clear glass of water (d) a balloon
24. 24.🧺 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) a battery cell
25. 25.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) a balloon (c) a mirror (d) yeast
26. 26.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) a sunny window (c) bright sunlight (d) a clear glass of water
27. 27.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
30. 30.True or false: a balloon is needed for the water rainbow. (a) False (b) True
31. 31.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) magnetism (c) refraction (d) reflection
32. 32.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns all red (d) it turns brighter
33. 33.⚖️ 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
34. 34.⚖️ 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) True (b) False
35. 35.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
36. 36.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a sunny window (c) a balloon (d) a magnet
37. 37.⚖️ 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
38. 38.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a battery cell (c) a sheet of white paper (d) a sunny window
39. 39.🌈 In VIBGYOR, what number colour is indigo?
40. 40.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True

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