Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 353 · 40 questions

What you do (Bounce, bounce, see): 1. An adult cuts a window near the top on one side of the carton and near the bottom on the other. 2. Tape one mirror at 45° behind each window, the two mirrors facing each other. 3. Look into the bottom window and adjust the mirrors until the view is clear. 4. Peep over a table or wall — never point it at the Sun.

1. 1.True or false: two small mirrors is not needed for the periscope. (a) True (b) False
2. 2.🛟 Which mirrors are safest for a children’s periscope? (a) plastic safety mirrors (b) broken glass bits (c) loose glass panes (d) big wall mirrors
3. 3.🔭 How many times does light bounce off a mirror in a simple periscope?
4. 4.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “how clear the view is”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: how clear the view is is kept the same. (a) False (b) True
6. 6.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the object we look at (b) how clear the view is (c) the angle of the mirrors (d) the same mirrors
7. 7.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the angle of the mirrors is the one thing we change. (a) False (b) True
8. 8.🔭 What does a periscope let you do? (a) see in the dark (b) hear far sounds (c) see germs (d) see over a wall
9. 9.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) two small mirrors (c) yeast (d) a ruler
10. 10.True or false: a dull brick reflects light well. (a) True (b) False
11. 11.🛟 Who should cut the holes in the juice carton? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
12. 12.🔍 Which is the odd one out? (a) a rough wooden board (b) a dull brick (c) a shiny steel plate (d) black cloth
13. 13.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is what we measure. (a) False (b) True
14. 14.🔭 At what angle are the mirrors set in a simple periscope? (a) 90 degrees (b) 45 degrees (c) 180 degrees (d) 10 degrees
15. 15.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is kept the same. (a) True (b) False
16. 16.True or false: a shiny steel plate reflects light poorly. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) dark soil (b) a dull brick (c) aluminium foil (d) black cloth
18. 18.True or false: a battery cell is not needed for the periscope. (a) False (b) True
19. 19.🛟 You must never point a periscope or a mirror at ___. (a) a friend’s toy (b) a wall (c) a tree (d) the Sun
20. 20.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) a ruler (c) turmeric powder (d) sticky tape
21. 21.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same mirrors is kept the same. (a) False (b) True
22. 22.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) a pencil (c) two small mirrors (d) yeast
23. 23.🧺 Which of these is not needed for the periscope? (a) a ruler (b) a pencil (c) an empty juice carton (d) a balloon
24. 24.🔭 Which of these reflects light poorly? (a) still clear water (b) dark soil (c) a shiny steel plate (d) a mirror
25. 25.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the angle of the mirrors”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a balloon (c) a pencil (d) sticky tape
27. 27.🔭 How many mirrors does a simple periscope use?
28. 28.🔍 Which is the odd one out? (a) aluminium foil (b) still clear water (c) black cloth (d) a shiny steel plate
29. 29.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a ruler (c) a pencil (d) a magnet
30. 30.🧺 Do we need turmeric powder for the periscope? (a) needed (b) not needed
31. 31.True or false: a ruler is needed for the periscope. (a) False (b) True
32. 32.🔭 Does a mirror reflect light well or poorly? (a) reflects light well (b) reflects light poorly
33. 33.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
34. 34.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) so light reaches the eye (c) to make it heavy (d) so it can float
35. 35.🔭 Which of these reflects light well? (a) dark soil (b) a rough wooden board (c) a shiny steel plate (d) black cloth
36. 36.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) in colour (b) upside down only (c) much bigger (d) flipped left to right
37. 37.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a brighter view (b) only darkness (c) two pictures (d) a rainbow
38. 38.True or false: black cloth reflects light poorly. (a) True (b) False
39. 39.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) sticky tape (c) an empty juice carton (d) vinegar
40. 40.True or false: a balloon is needed for the periscope. (a) False (b) True

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