Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 923 · 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.🔭 How many mirrors does a simple periscope use?
2. 2.🔭 At what angle are the mirrors set in a simple periscope? (a) 90 degrees (b) 45 degrees (c) 180 degrees (d) 10 degrees
3. 3.🔍 Which is the odd one out? (a) aluminium foil (b) still clear water (c) a rough wooden board (d) a shiny steel plate
4. 4.🧺 Do we need a ruler for the periscope? (a) needed (b) not needed
5. 5.True or false: a shiny steel plate reflects light poorly. (a) True (b) False
6. 6.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) in colour (b) much bigger (c) upside down only (d) flipped left to right
8. 8.True or false: a rough wooden board reflects light poorly. (a) False (b) True
9. 9.📘 Light bouncing off a mirror is called ___. (a) magnetism (b) refraction (c) evaporation (d) reflection
10. 10.🧺 Do we need a balloon for the periscope? (a) not needed (b) needed
11. 11.True or false: a dull brick reflects light well. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) still clear water (b) black cloth (c) a mirror (d) aluminium foil
13. 13.🔭 Which of these reflects light well? (a) a rough wooden board (b) black cloth (c) aluminium foil (d) dark soil
14. 14.🔍 Which is the odd one out? (a) black cloth (b) a dull brick (c) dark soil (d) a mirror
15. 15.🧺 Which of these is needed for the periscope? (a) turmeric powder (b) a magnet (c) a balloon (d) two small mirrors
16. 16.True or false: a pencil is needed for the periscope. (a) True (b) False
17. 17.True or false: aluminium foil reflects light well. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) a shiny steel plate (b) a mirror (c) a dull brick (d) aluminium foil
19. 19.🔭 How many times does light bounce off a mirror in a simple periscope?
20. 20.🧺 Which of these is not needed for the periscope? (a) a pencil (b) an empty juice carton (c) vinegar (d) two small mirrors
21. 21.🧺 Do we need yeast for the periscope? (a) not needed (b) needed
22. 22.🔮 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
23. 23.True or false: yeast is needed for the periscope. (a) False (b) True
24. 24.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light well (b) reflects light poorly
25. 25.🧺 Do we need vinegar for the periscope? (a) needed (b) not needed
26. 26.True or false: still clear water reflects light well. (a) False (b) True
27. 27.True or false: black cloth reflects light well. (a) False (b) True
28. 28.True or false: vinegar is needed for the periscope. (a) False (b) True
29. 29.⚖️ 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
30. 30.🔭 Who uses a periscope to look above the water? (a) a pilot in a plane (b) a baker (c) a submarine crew (d) a farmer
31. 31.True or false: dark soil reflects light well. (a) False (b) True
32. 32.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the object we look at is what we measure. (a) True (b) False
33. 33.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
34. 34.🧺 Which of these is not needed for the periscope? (a) turmeric powder (b) sticky tape (c) a pencil (d) an empty juice carton
35. 35.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the same mirrors (b) the same light (c) the angle of the mirrors (d) how clear the view is
36. 36.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) sticky tape (c) a ruler (d) turmeric powder
37. 37.🔭 Does still clear water reflect light well or poorly? (a) reflects light poorly (b) reflects light well
38. 38.🔭 Which of these reflects light well? (a) a dull brick (b) a shiny steel plate (c) a rough wooden board (d) dark soil
39. 39.⚖️ 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 same mirrors
40. 40.🛟 You must never point a periscope or a mirror at ___. (a) the Sun (b) a tree (c) a friend’s toy (d) a wall

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