Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 79 · 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 time of day”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) the glass is painted (d) water splits the light
3. 3.🧺 Which of these is not needed for the water rainbow? (a) a battery cell (b) bright sunlight (c) a sunny window (d) a sheet of white paper
4. 4.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it does not fall (c) so the Sun moves (d) so it gets hot
5. 5.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a clear glass of water (c) turmeric powder (d) yeast
7. 7.⚖️ 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
8. 8.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
9. 9.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) turmeric powder (c) a sheet of white paper (d) a sunny window
10. 10.🌈 In VIBGYOR, what number colour is violet?
11. 11.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
12. 12.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
13. 13.🌈 How many colours do we name in a rainbow (VIBGYOR)?
14. 14.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
15. 15.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
16. 16.⚖️ 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 same glass (b) the time of day (c) the same window (d) brightness of rainbow
17. 17.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
18. 18.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
19. 19.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
20. 20.⚖️ 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) True (b) False
21. 21.🧺 Which of these is not needed for the water rainbow? (a) a mirror (b) a clear glass of water (c) bright sunlight (d) a sheet of white paper
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) a sunny window (c) a clear glass of water (d) bright sunlight
24. 24.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) snow falling (c) a magnet (d) a small rainbow
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) never look at the Sun (d) stare at the Sun
26. 26.🌈 In VIBGYOR, what number colour is green?
27. 27.⚖️ 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 white paper (c) the amount of water (d) brightness of rainbow
28. 28.🌈 In VIBGYOR, what number colour is yellow?
29. 29.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny drops of water (c) many colours mixed (d) tiny bits of dust
30. 30.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) orange (c) red (d) violet
31. 31.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) behind you (c) in front of you (d) under the ground
32. 32.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
33. 33.🌈 In VIBGYOR, what number colour is red?
34. 34.True or false: a mirror is 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? True or false: the same window is kept the same. (a) True (b) False
36. 36.🌈 In VIBGYOR, what number colour is indigo?
37. 37.🌈 In VIBGYOR, what number colour is orange?
38. 38.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a magnet (d) a clear glass of water
40. 40.⚖️ 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) True (b) False

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