Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 81 · 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 glass is kept the same. (a) True (b) False
2. 2.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the glass is painted (c) the water is coloured (d) water splits the light
3. 3.🌈 In VIBGYOR, what number colour is yellow?
4. 4.☀️ 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
5. 5.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) yeast (c) a sunny window (d) bright sunlight
6. 6.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) look at it through glass (d) never look at the Sun
7. 7.🌈 How many colours do we name in a rainbow (VIBGYOR)?
8. 8.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a sheet of white paper (d) a battery cell
10. 10.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns brighter (c) it floats away (d) it turns all red
11. 11.⚖️ 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 white paper (b) the time of day (c) the amount of water (d) brightness of rainbow
12. 12.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ 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 measure it (c) we keep it the same
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.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.⚖️ 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 time of day (c) the same glass (d) brightness of rainbow
19. 19.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a magnet (c) snow falling (d) a small rainbow
20. 20.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a balloon (c) bright sunlight (d) a sunny window
21. 21.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it turns blue (c) so the Sun moves (d) so it gets hot
22. 22.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) bright sunlight (c) a sheet of white paper (d) a sunny window
23. 23.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) red (b) blue (c) green (d) violet
24. 24.🧺 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 sheet of white paper (d) a magnet
25. 25.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) violet (c) orange (d) yellow
26. 26.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
27. 27.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
28. 28.⚖️ 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
29. 29.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
30. 30.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) magnets (c) clouds (d) balloons
31. 31.True or false: a magnet is needed for the water rainbow. (a) True (b) False
32. 32.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
33. 33.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) True (b) False
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) True (b) False
35. 35.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) refraction (c) reflection (d) evaporation
36. 36.🌈 In VIBGYOR, what number colour is orange?
37. 37.🌈 In VIBGYOR, what number colour is indigo?
38. 38.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a battery cell (c) a sheet of white paper (d) a sunny window
40. 40.⚖️ 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 measure it (c) we keep it the same

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