Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 251 · 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 same white paper is kept the same. (a) True (b) False
2. 2.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a sheet of white paper (c) turmeric powder (d) a balloon
3. 3.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) red (c) green (d) violet
4. 4.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
5. 5.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) never look at the Sun (d) look at it through glass
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 window”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
8. 8.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a sunny window (d) a magnet
9. 9.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) yellow (c) orange (d) violet
10. 10.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a clear glass of water (c) a mirror (d) a sunny window
11. 11.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a magnet (c) turmeric powder (d) a clear glass of water
14. 14.⚖️ 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) brightness of rainbow (c) the time of day (d) the same white paper
15. 15.⚖️ 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
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 time of day (b) the same window (c) the same glass (d) the amount of water
17. 17.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so the Sun moves (d) so it turns blue
18. 18.⚖️ 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 change it (b) we keep it the same (c) we measure it
19. 19.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
20. 20.🌈 In VIBGYOR, what number colour is yellow?
21. 21.🌈 In VIBGYOR, what number colour is indigo?
22. 22.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is the one thing we change. (a) False (b) True
23. 23.🌈 In VIBGYOR, what number colour is violet?
24. 24.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
25. 25.🌈 How many colours do we name in a rainbow (VIBGYOR)?
26. 26.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
27. 27.☀️ What is white sunlight really made of? (a) many colours mixed (b) tiny bits of dust (c) tiny drops of water (d) only yellow light
28. 28.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) water splits the light (d) the paper makes colours
29. 29.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
30. 30.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) a shadow of ice (d) snow falling
31. 31.🌈 In VIBGYOR, what number colour is blue?
32. 32.🌈 In VIBGYOR, what number colour is red?
33. 33.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) the rainbow fades (c) it floats away (d) it turns all red
34. 34.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
35. 35.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
36. 36.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) a balloon
37. 37.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
38. 38.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
39. 39.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
40. 40.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) yeast (c) a magnet (d) a sunny window

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