Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 661 · 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.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) so it can float (c) to make it heavy (d) so light reaches the eye
2. 2.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same light is what we measure. (a) False (b) True
3. 3.🧺 Do we need a magnet for the periscope? (a) not needed (b) needed
4. 4.🔭 How many times does light bounce off a mirror in a simple periscope?
5. 5.🧺 Do we need a balloon for the periscope? (a) not needed (b) needed
6. 6.🔭 Which of these reflects light well? (a) black cloth (b) a dull brick (c) dark soil (d) a mirror
7. 7.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) a ruler (c) a pencil (d) a magnet
8. 8.True or false: a balloon is needed for the periscope. (a) False (b) True
9. 9.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the same carton (b) how clear the view is (c) the angle of the mirrors (d) the object we look at
10. 10.🔭 Which of these reflects light poorly? (a) a mirror (b) still clear water (c) dark soil (d) a shiny steel plate
11. 11.🔍 Which is the odd one out? (a) a shiny steel plate (b) a rough wooden board (c) still clear water (d) aluminium foil
12. 12.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🔭 How many mirrors does a simple periscope use?
14. 14.True or false: a magnet is needed for the periscope. (a) True (b) False
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) how clear the view is (b) the angle of the mirrors (c) the object we look at
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.🧺 Which of these is not needed for the periscope? (a) a pencil (b) an empty juice carton (c) sticky tape (d) vinegar
19. 19.📘 Light bouncing off a mirror is called ___. (a) magnetism (b) reflection (c) refraction (d) evaporation
20. 20.🧺 Which of these is not needed for the periscope? (a) two small mirrors (b) yeast (c) an empty juice carton (d) a ruler
21. 21.True or false: dark soil reflects light well. (a) False (b) True
22. 22.🔭 Does a dull brick reflect light well or poorly? (a) reflects light well (b) reflects light poorly
23. 23.🛟 Which mirrors are safest for a children’s periscope? (a) plastic safety mirrors (b) big wall mirrors (c) broken glass bits (d) loose glass panes
24. 24.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) sticky tape (c) a ruler (d) a balloon
25. 25.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) nothing at all (b) the ground (c) only short walls (d) taller walls
26. 26.🧺 Which of these is needed for the periscope? (a) a balloon (b) yeast (c) turmeric powder (d) sticky tape
27. 27.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the object we look at”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.🔭 Does a mirror reflect light well or poorly? (a) reflects light well (b) reflects light poorly
29. 29.True or false: sticky tape is needed for the periscope. (a) True (b) False
30. 30.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
31. 31.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) the angle of the mirrors (b) the same light (c) the same carton (d) how clear the view is
32. 32.🔭 Which of these reflects light well? (a) a rough wooden board (b) black cloth (c) still clear water (d) a dull brick
33. 33.🧺 Do we need two small mirrors for the periscope? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) yeast (c) sticky tape (d) two small mirrors
35. 35.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same light”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) a battery cell (c) an empty juice carton (d) a pencil
37. 37.🔍 Which is the odd one out? (a) a shiny steel plate (b) aluminium foil (c) black cloth (d) a mirror
38. 38.🔭 At what angle are the mirrors set in a simple periscope? (a) 10 degrees (b) 180 degrees (c) 90 degrees (d) 45 degrees
39. 39.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a rainbow (b) two pictures (c) a brighter view (d) only darkness
40. 40.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) upside down only (b) in colour (c) flipped left to right (d) much bigger

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