Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 778 · 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 magnet is needed for the water rainbow. (a) True (b) False
2. 2.True or false: a balloon is needed for the water rainbow. (a) True (b) False
3. 3.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it does not fall (c) so it gets hot (d) so the Sun moves
4. 4.🌈 In VIBGYOR, what number colour is red?
5. 5.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
6. 6.☀️ 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
7. 7.⚖️ 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
8. 8.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sunny window (c) a clear glass of water (d) a sheet of white paper
9. 9.True or false: bright sunlight is needed for the water rainbow. (a) False (b) True
10. 10.🌈 How many colours do we name in a rainbow (VIBGYOR)?
11. 11.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a small rainbow (c) a shadow of ice (d) snow falling
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a magnet (c) bright sunlight (d) a sunny window
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) yeast (c) a clear glass of water (d) a battery cell
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a battery cell (d) a sunny window
16. 16.⚖️ 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 same window (b) the amount of water (c) brightness of rainbow (d) the same glass
17. 17.⚖️ 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
18. 18.⚖️ 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) the same white paper (c) brightness of rainbow
19. 19.🌈 In VIBGYOR, what number colour is indigo?
20. 20.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
21. 21.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
22. 22.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
23. 23.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
24. 24.🧺 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 sunny window (d) yeast
25. 25.True or false: a clear glass of water is needed for the water rainbow. (a) True (b) False
26. 26.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) the water is coloured (c) water splits the light (d) the paper makes colours
27. 27.⚖️ 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
28. 28.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it in a mirror (c) look at it through glass (d) stare at the Sun
29. 29.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) magnets (c) prisms (d) clouds
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a mirror (c) a sheet of white paper (d) bright sunlight
31. 31.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) it turns brighter (d) the rainbow fades
32. 32.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
33. 33.🌈 In VIBGYOR, what number colour is violet?
34. 34.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) magnetism (c) reflection (d) refraction
35. 35.⚖️ 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) the time of day (c) brightness of rainbow
36. 36.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
37. 37.🌈 In VIBGYOR, what number colour is green?
38. 38.🧺 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) turmeric powder (d) a sheet of white paper
39. 39.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
40. 40.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) red (b) blue (c) violet (d) green

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