Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 545 · 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.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) the rainbow fades (d) it turns brighter
2. 2.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) magnets (c) clouds (d) balloons
3. 3.🌈 In VIBGYOR, what number colour is indigo?
4. 4.🌈 How many colours do we name in a rainbow (VIBGYOR)?
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) yeast (c) turmeric powder (d) bright sunlight
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is what we measure. (a) True (b) False
8. 8.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
9. 9.⚖️ 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
10. 10.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a mirror (c) a clear glass of water (d) a balloon
11. 11.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
12. 12.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
13. 13.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
14. 14.🧺 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 sheet of white paper
15. 15.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) bright sunlight (c) a sunny window (d) a magnet
16. 16.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) green (c) violet (d) red
17. 17.☀️ 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
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) brightness of rainbow (b) the same white paper (c) the amount of water (d) the same window
19. 19.⚖️ 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) True (b) False
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.🌈 In VIBGYOR, what number colour is violet?
22. 22.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a shadow of ice (d) a magnet
23. 23.🧺 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 sheet of white paper (d) turmeric powder
24. 24.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
25. 25.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) the paper makes colours (d) water splits the light
26. 26.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
27. 27.🌈 In VIBGYOR, what number colour is red?
28. 28.🌈 In VIBGYOR, what number colour is green?
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) never look at the Sun (d) look at it in a mirror
31. 31.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
32. 32.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
33. 33.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) turmeric powder (c) a mirror (d) a sheet of white paper
34. 34.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) violet (c) orange (d) red
35. 35.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
36. 36.⚖️ 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 time of day (b) the same glass (c) brightness of rainbow (d) the same white paper
37. 37.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
38. 38.🧺 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 sunny window (d) a mirror
39. 39.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
40. 40.🛟 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 it turns blue (d) so the Sun moves

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