Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 523 · 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.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a mirror (c) a sheet of white paper (d) a balloon
2. 2.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
3. 3.⚖️ 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 white paper (d) the amount of water
4. 4.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) never look at the Sun (d) stare at the Sun
5. 5.⚖️ 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) True (b) False
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.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a magnet (c) a small rainbow (d) snow falling
8. 8.🌈 In VIBGYOR, what number colour is violet?
9. 9.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it does not fall (c) so it gets hot (d) so it turns blue
10. 10.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it floats away (d) it turns brighter
11. 11.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.🌈 In VIBGYOR, what number colour is indigo?
14. 14.🌈 In VIBGYOR, what number colour is yellow?
15. 15.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
16. 16.☀️ 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
17. 17.True or false: yeast is needed for the water rainbow. (a) False (b) True
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) a sunny window (c) a sheet of white paper (d) a clear glass of water
19. 19.⚖️ 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
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same white paper (c) brightness of rainbow
21. 21.⚖️ 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
22. 22.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) turmeric powder (c) a magnet (d) a battery cell
23. 23.🌈 In VIBGYOR, what number colour is orange?
24. 24.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the time of day (b) the amount of water (c) brightness of rainbow
26. 26.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a magnet (c) bright sunlight (d) a clear glass of water
28. 28.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) the paper makes colours (d) water splits the light
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.⚖️ 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) False (b) True
33. 33.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) yellow (c) violet (d) red
34. 34.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) evaporation (d) reflection
35. 35.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a sunny window (d) a battery cell
36. 36.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) a sunny window (c) a sheet of white paper (d) bright sunlight
37. 37.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
38. 38.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) magnets (c) clouds (d) prisms
39. 39.⚖️ 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 same white paper (d) the amount of water
40. 40.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a mirror (c) a magnet (d) a sunny window

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