Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 945 · 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) yeast (c) a sunny window (d) a balloon
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) True (b) False
3. 3.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
4. 4.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) prisms (c) magnets (d) balloons
5. 5.🌈 How many colours do we name in a rainbow (VIBGYOR)?
6. 6.⚖️ 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
7. 7.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a balloon (c) a sheet of white paper (d) yeast
8. 8.⚖️ 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
9. 9.🌈 In VIBGYOR, what number colour is blue?
10. 10.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
11. 11.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
12. 12.🌈 In VIBGYOR, what number colour is violet?
13. 13.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
14. 14.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) red (c) orange (d) violet
15. 15.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so the Sun moves (d) so it turns blue
16. 16.⚖️ 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) brightness of rainbow (c) the same window
17. 17.🧺 Which of these is not needed for the water rainbow? (a) a magnet (b) a sunny window (c) bright sunlight (d) a clear glass of water
18. 18.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
19. 19.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
20. 20.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) only yellow light (c) many colours mixed (d) tiny drops of water
21. 21.⚖️ 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 amount of water (c) the same window (d) brightness of rainbow
22. 22.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
23. 23.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a shadow of ice (c) a small rainbow (d) snow falling
24. 24.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
25. 25.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a battery cell (d) a sunny window
26. 26.🧺 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 clear glass of water
27. 27.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
28. 28.True or false: yeast is not needed for the water rainbow. (a) True (b) False
29. 29.True or false: a mirror is needed for the water rainbow. (a) True (b) False
30. 30.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) evaporation (d) reflection
31. 31.🛟 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
32. 32.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) a magnet (d) a sunny window
34. 34.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) straight above you (c) under the ground (d) behind you
35. 35.True or false: yeast is needed for the water rainbow. (a) False (b) True
36. 36.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a balloon
37. 37.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
38. 38.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a mirror (c) a sheet of white paper (d) bright sunlight
39. 39.⚖️ 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
40. 40.🌈 In VIBGYOR, what number colour is red?

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