Rainbow Science Experiment Worksheet

Science experiments lesson 5: Make a rainbow with water and sunlight · Set 581 · 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.⚖️ 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) True (b) False
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 amount of water (b) brightness of rainbow (c) the same white paper (d) the same window
3. 3.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
4. 4.🌈 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
5. 5.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) yeast (c) a mirror (d) a magnet
7. 7.⚖️ 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 glass (c) brightness of rainbow
8. 8.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) green (c) red (d) violet
9. 9.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) a sunny window (d) a mirror
10. 10.⚖️ 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) True (b) False
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) False (b) True
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) a battery cell (d) a clear glass of water
13. 13.🛟 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
14. 14.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
15. 15.🌈 In VIBGYOR, what number colour is indigo?
16. 16.🌈 How many colours do we name in a rainbow (VIBGYOR)?
17. 17.🌈 In VIBGYOR, what number colour is blue?
18. 18.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
21. 21.True or false: turmeric powder is not needed for the water rainbow. (a) False (b) True
22. 22.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a clear glass of water (c) bright sunlight (d) a magnet
23. 23.True or false: yeast is not needed for the water rainbow. (a) False (b) True
24. 24.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a magnet (b) a sheet of white paper (c) bright sunlight (d) a sunny window
25. 25.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
26. 26.True or false: a mirror is not needed for the water rainbow. (a) False (b) True
27. 27.⚖️ 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 amount of water (c) the same window (d) brightness of rainbow
28. 28.🧺 Which of these is needed for the water rainbow? (a) a sunny window (b) turmeric powder (c) a mirror (d) a magnet
29. 29.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny drops of water (c) many colours mixed (d) tiny bits of dust
30. 30.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
31. 31.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) a sunny window (d) yeast
32. 32.🌈 In VIBGYOR, what number colour is yellow?
33. 33.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
34. 34.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) turmeric powder (b) a clear glass of water (c) a sunny window (d) bright sunlight
36. 36.🌈 In VIBGYOR, what number colour is violet?
37. 37.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) magnets (c) balloons (d) prisms
38. 38.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so it does not fall (d) so the Sun moves
39. 39.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
40. 40.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the amount of water (c) the same window

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