Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 785 · 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.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) yeast (d) bright sunlight
2. 2.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not 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 amount of water (b) the same white paper (c) the same window (d) the same glass
4. 4.⚖️ 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 time of day (c) the same glass (d) the amount of water
5. 5.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
6. 6.⚖️ 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
7. 7.🧺 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 magnet (d) a sheet of white paper
8. 8.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) turmeric powder (c) a balloon (d) a sunny window
9. 9.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
10. 10.⚖️ 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 change it (c) we measure it
11. 11.True or false: bright sunlight is needed for the water rainbow. (a) False (b) True
12. 12.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it gets hot (d) so it does not fall
13. 13.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) many colours mixed (c) only yellow light (d) tiny drops of water
14. 14.True or false: a sunny window is not needed for the water rainbow. (a) False (b) True
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is the one thing we change. (a) False (b) True
16. 16.True or false: yeast is needed for the water rainbow. (a) True (b) False
17. 17.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is what we measure. (a) True (b) False
19. 19.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) a magnet (c) turmeric powder (d) a balloon
20. 20.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) a sheet of white paper (d) a mirror
21. 21.🌈 How many colours do we name in a rainbow (VIBGYOR)?
22. 22.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) look at it through glass (d) never look at the Sun
23. 23.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) green (c) blue (d) red
24. 24.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
25. 25.🌈 In VIBGYOR, what number colour is indigo?
26. 26.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the paper makes colours (c) the water is coloured (d) the glass is painted
27. 27.🌈 In VIBGYOR, what number colour is blue?
28. 28.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a small rainbow (d) a shadow of ice
29. 29.⚖️ 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 same white paper (b) the amount of water (c) brightness of rainbow
30. 30.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
31. 31.📘 What do we call light bending as it passes from air into water? (a) reflection (b) evaporation (c) magnetism (d) refraction
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
34. 34.True or false: a balloon is needed for the water rainbow. (a) True (b) False
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) False (b) True
36. 36.🌈 In VIBGYOR, what number colour is yellow?
37. 37.🧺 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 balloon (d) a sunny window
38. 38.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
39. 39.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
40. 40.⚖️ 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

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