Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 660 · 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.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) behind you (c) under the ground (d) straight above you
2. 2.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) stare at the Sun (d) never look at the Sun
3. 3.🧺 Which of these is not needed for the water rainbow? (a) yeast (b) a clear glass of water (c) a sunny window (d) bright sunlight
4. 4.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a sunny window (c) a battery cell (d) a mirror
5. 5.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
6. 6.True or false: bright sunlight is needed for the water rainbow. (a) False (b) True
7. 7.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
8. 8.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) False (b) True
9. 9.⚖️ 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 amount of water (b) the time of day (c) brightness of rainbow (d) the same glass
10. 10.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.📘 What do we call light bending as it passes from air into water? (a) magnetism (b) refraction (c) evaporation (d) reflection
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) True (b) False
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a mirror (c) a sheet of white paper (d) bright sunlight
16. 16.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) a balloon (d) a sunny window
17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
18. 18.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a balloon (c) a clear glass of water (d) yeast
19. 19.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it turns brighter (d) it floats away
20. 20.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True
21. 21.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
22. 22.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) water splits the light (c) the water is coloured (d) the glass is painted
23. 23.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
24. 24.🔮 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
25. 25.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny bits of dust (c) many colours mixed (d) tiny drops of water
26. 26.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.🌈 In VIBGYOR, what number colour is violet?
30. 30.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
31. 31.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
32. 32.🧺 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 sunny window
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a battery cell (d) bright sunlight
34. 34.⚖️ 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) brightness of rainbow (d) the same window
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) yeast (d) a sunny window
37. 37.🌈 In VIBGYOR, what number colour is blue?
38. 38.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
39. 39.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) violet (b) yellow (c) orange (d) red
40. 40.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a battery cell (c) bright sunlight (d) a sunny window

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