Shadow and Sundial Experiment Worksheet

Science experiments lesson 27: Shadows and a sundial · Set 87 · 40 questions

What you do (Shadows point away from the Sun): 1. Stand the stick upright in the ground in an open sunny place. 2. Every hour, mark the tip of the shadow with chalk and write the time. 3. Measure the length of each shadow. 4. Wear a cap and never look straight at the Sun.

1. 1.🔦 Which of these is opaque? (a) clean water (b) clear plastic film (c) a steel plate (d) clear glass
2. 2.True or false: a book is transparent. (a) True (b) False
3. 3.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) chalk to mark shadows (b) turmeric powder (c) a straight stick (d) a sunny open place
4. 4.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is the one thing we change? (a) the same stick (b) the same spot (c) the time of day (d) the stick kept upright
5. 5.🔮 Predict: on a fully cloudy day, the sundial ___. (a) works better (b) runs faster (c) does not work well (d) shows two times
6. 6.True or false: a steel plate is opaque. (a) True (b) False
7. 7.True or false: oily paper is translucent. (a) False (b) True
8. 8.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a straight stick (b) a clock to check (c) a battery cell (d) a sunny open place
9. 9.🔍 Which is the odd one out? (a) a wooden board (b) clear plastic film (c) a book (d) a steel plate
10. 10.📘 Why does a shadow form? (a) the object is cold (b) the ground is dark (c) an object blocks light (d) light bends round it
11. 11.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the time of day is what we measure. (a) False (b) True
12. 12.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the time of day”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.True or false: a brick is opaque. (a) False (b) True
14. 14.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) chalk to mark shadows (b) a mirror (c) a straight stick (d) a sunny open place
15. 15.True or false: tissue paper is translucent. (a) True (b) False
16. 16.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the stick kept upright is kept the same. (a) True (b) False
17. 17.🛟 What should you wear for a long time in the hot sun? (a) a cap or hat (b) nothing on your head (c) a woollen sweater (d) a raincoat
18. 18.🧺 Do we need chalk to mark shadows for the shadow clock? (a) not needed (b) needed
19. 19.True or false: clear plastic film is translucent. (a) True (b) False
20. 20.🔮 Predict: you move a torch closer to your hand. The shadow on the wall gets ___. (a) brighter (b) coloured (c) smaller (d) bigger
21. 21.🔦 Is clean water opaque, translucent or transparent? (a) transparent (b) opaque (c) translucent
22. 22.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a clock to check (b) a sunny open place (c) a magnet (d) a straight stick
23. 23.🧺 Which of these is not needed for the shadow clock? (a) chalk to mark shadows (b) a straight stick (c) a balloon (d) a clock to check
24. 24.🌞 When is a stick’s shadow the shortest? (a) early morning (b) late evening (c) around noon (d) at night
25. 25.True or false: chalk to mark shadows is not needed for the shadow clock. (a) True (b) False
26. 26.🧺 Which of these is needed for the shadow clock? (a) turmeric powder (b) a straight stick (c) a magnet (d) yeast
27. 27.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a balloon (b) a clock to check (c) a straight stick (d) chalk to mark shadows
28. 28.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is what we measure? (a) the time of day (b) the same stick (c) shadow length (d) the same spot
29. 29.🔦 Is tissue paper opaque, translucent or transparent? (a) opaque (b) translucent (c) transparent
30. 30.True or false: a mirror is not needed for the shadow clock. (a) False (b) True
31. 31.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the time of day is the one thing we change. (a) True (b) False
32. 32.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is kept the same? (a) shadow length (b) the same stick (c) the time of day
33. 33.True or false: a sunny open place is not needed for the shadow clock. (a) False (b) True
34. 34.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the same stick”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the time of day is kept the same. (a) False (b) True
36. 36.🧺 Which of these is needed for the shadow clock? (a) a mirror (b) turmeric powder (c) chalk to mark shadows (d) a balloon
37. 37.True or false: frosted glass is transparent. (a) True (b) False
38. 38.🔦 Which of these is transparent? (a) frosted glass (b) air (c) your hand (d) a wooden board
39. 39.🌅 In the morning the Sun is in the east. Which way does a shadow point? (a) east (b) north (c) west (d) up
40. 40.🛟 While watching shadows outdoors, what must you never do? (a) sit in the shade (b) wear a cap (c) look straight at the Sun (d) mark with chalk

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