Rainbow Science Experiment Worksheet

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

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