Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 629 · 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.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
2. 2.⚖️ 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 amount of water (c) the same glass (d) the same white paper
3. 3.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) look at it in a mirror (d) never look at the Sun
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a battery cell (c) a clear glass of water (d) a sunny window
5. 5.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.⚖️ 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) brightness of rainbow (c) the same window (d) the time of day
8. 8.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a mirror (c) a clear glass of water (d) yeast
9. 9.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) straight above you (c) in front of you (d) behind you
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) turmeric powder (c) a clear glass of water (d) a sheet of white paper
13. 13.🌈 In VIBGYOR, what number colour is orange?
14. 14.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a mirror (c) a sunny window (d) bright sunlight
15. 15.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) prisms (d) balloons
16. 16.True or false: a balloon is needed for the water rainbow. (a) True (b) False
17. 17.⚖️ 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) False (b) True
18. 18.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
19. 19.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
20. 20.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
21. 21.🌈 In VIBGYOR, what number colour is red?
22. 22.⚖️ 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
23. 23.🌈 In VIBGYOR, what number colour is yellow?
24. 24.🌈 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
25. 25.🛟 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 it gets hot (d) so the Sun moves
26. 26.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
27. 27.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
28. 28.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
29. 29.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) yeast (d) bright sunlight
31. 31.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) tiny drops of water (c) many colours mixed (d) only yellow light
32. 32.⚖️ 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
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a sheet of white paper (c) turmeric powder (d) a magnet
35. 35.⚖️ 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
36. 36.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
37. 37.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
38. 38.📘 What do we call light bending as it passes from air into water? (a) reflection (b) magnetism (c) refraction (d) evaporation
39. 39.⚖️ 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
40. 40.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) it turns all red (d) the rainbow fades

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