Shadow and Sundial Experiment Worksheet

Science experiments lesson 27: Shadows and a sundial · Set 710 · 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.🔦 Is a wooden board opaque, translucent or transparent? (a) opaque (b) translucent (c) transparent
2. 2.🌞 When is a stick’s shadow the shortest? (a) early morning (b) late evening (c) around noon (d) at night
3. 3.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is what we measure? (a) the same stick (b) the stick kept upright (c) the time of day (d) shadow length
4. 4.🧺 Do we need turmeric powder for the shadow clock? (a) needed (b) not needed
5. 5.🧺 Do we need a straight stick for the shadow clock? (a) not needed (b) needed
6. 6.🧺 Do we need a balloon for the shadow clock? (a) not needed (b) needed
7. 7.🌅 In the morning the Sun is in the east. Which way does a shadow point? (a) up (b) west (c) north (d) east
8. 8.📘 Why does a shadow form? (a) the object is cold (b) light bends round it (c) the ground is dark (d) an object blocks light
9. 9.⚖️ 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 time of day (c) the stick kept upright (d) shadow length
10. 10.🧺 Which of these is needed for the shadow clock? (a) a balloon (b) a magnet (c) yeast (d) chalk to mark shadows
11. 11.🔦 Is frosted glass opaque, translucent or transparent? (a) translucent (b) opaque (c) transparent
12. 12.🧺 Do we need a sunny open place for the shadow clock? (a) not needed (b) needed
13. 13.⚖️ 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) False (b) True
14. 14.🛟 While watching shadows outdoors, what must you never do? (a) sit in the shade (b) wear a cap (c) mark with chalk (d) look straight at the Sun
15. 15.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a clock to check (b) a straight stick (c) chalk to mark shadows (d) a magnet
16. 16.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the stick kept upright”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.True or false: clear glass is transparent. (a) True (b) False
18. 18.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same spot is what we measure. (a) False (b) True
19. 19.🛟 What should you wear for a long time in the hot sun? (a) a cap or hat (b) a raincoat (c) a woollen sweater (d) nothing on your head
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.🧺 Do we need yeast for the shadow clock? (a) not needed (b) needed
22. 22.🔦 Which of these is opaque? (a) tissue paper (b) a steel plate (c) clear plastic film (d) clear glass
23. 23.🧺 Which of these is needed for the shadow clock? (a) a clock to check (b) turmeric powder (c) yeast (d) a battery cell
24. 24.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a clock to check (b) a battery cell (c) a straight stick (d) chalk to mark shadows
25. 25.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a balloon (b) a sunny open place (c) chalk to mark shadows (d) a clock to check
26. 26.🧺 Which of these is needed for the shadow clock? (a) turmeric powder (b) a magnet (c) a mirror (d) a straight stick
27. 27.True or false: a straight stick is not needed for the shadow clock. (a) True (b) False
28. 28.🧺 Do we need a mirror for the shadow clock? (a) needed (b) not needed
29. 29.True or false: your hand is transparent. (a) True (b) False
30. 30.🔮 Predict: on a fully cloudy day, the sundial ___. (a) works better (b) runs faster (c) shows two times (d) does not work well
31. 31.🔍 Which is the odd one out? (a) a book (b) clear plastic film (c) air (d) clean water
32. 32.🧺 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
33. 33.⚖️ 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
34. 34.🔦 Which of these is opaque? (a) tissue paper (b) clean water (c) your hand (d) butter paper
35. 35.True or false: clear glass is opaque. (a) True (b) False
36. 36.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “the time of day”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.True or false: air is opaque. (a) True (b) False
38. 38.True or false: a battery cell is needed for the shadow clock. (a) False (b) True
39. 39.⚖️ 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) True (b) False
40. 40.🔦 Which of these is transparent? (a) clean water (b) a brick (c) your hand (d) a wooden board

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