Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 404 · 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.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is what we measure. (a) True (b) False
2. 2.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a battery cell (c) a mirror (d) yeast
3. 3.⚖️ 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
4. 4.☀️ 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
5. 5.🌈 In VIBGYOR, what number colour is orange?
6. 6.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) a clear glass of water (d) a battery cell
7. 7.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) clouds (c) magnets (d) prisms
8. 8.🌈 How many colours do we name in a rainbow (VIBGYOR)?
9. 9.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) magnetism (c) reflection (d) refraction
10. 10.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
11. 11.⚖️ 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 same window (c) the same glass (d) brightness of rainbow
12. 12.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
13. 13.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
14. 14.🌈 In VIBGYOR, what number colour is yellow?
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) yeast (c) bright sunlight (d) a clear glass of water
16. 16.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) orange (c) yellow (d) violet
17. 17.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a clear glass of water (c) a magnet (d) a mirror
18. 18.⚖️ 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) brightness of rainbow (b) the same window (c) the amount of water (d) the time of day
19. 19.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it does not fall (d) so it turns blue
20. 20.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
21. 21.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
22. 22.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (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? True or false: the time of day is kept the same. (a) False (b) True
24. 24.🌈 In VIBGYOR, what number colour is violet?
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
27. 27.True or false: a mirror is needed for the water rainbow. (a) False (b) True
28. 28.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
29. 29.True or false: yeast is not needed for the water rainbow. (a) False (b) True
30. 30.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) red (d) green
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? What do we do with “the time of day”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) behind you (c) straight above you (d) under the ground
34. 34.⚖️ 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) False (b) True
35. 35.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
36. 36.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
37. 37.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
38. 38.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a shadow of ice (d) a magnet
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window 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 clear glass of water (b) bright sunlight (c) a sunny window (d) a mirror

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