Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 1 · 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.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) a ruler (c) an empty juice carton (d) vinegar
3. 3.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) the ground (b) only short walls (c) taller walls (d) nothing at all
4. 4.🔭 What does a periscope let you do? (a) hear far sounds (b) see germs (c) see in the dark (d) see over a wall
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.🛟 You must never point a periscope or a mirror at ___. (a) the Sun (b) a wall (c) a friend’s toy (d) a tree
7. 7.🧺 Which of these is needed for the periscope? (a) vinegar (b) a battery cell (c) two small mirrors (d) yeast
8. 8.⚖️ 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
9. 9.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) the angle of the mirrors (b) the same carton (c) how clear the view is
10. 10.True or false: turmeric powder is needed for the periscope. (a) True (b) False
11. 11.True or false: dark soil reflects light poorly. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) aluminium foil (b) dark soil (c) a dull brick (d) black cloth
13. 13.🔭 How many times does light bounce off a mirror in a simple periscope?
14. 14.⚖️ 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
15. 15.🔭 Which of these reflects light well? (a) aluminium foil (b) black cloth (c) a rough wooden board (d) a dull brick
16. 16.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) to make it heavy (c) so it can float (d) so light reaches the eye
17. 17.🧺 Do we need a pencil for the periscope? (a) needed (b) not needed
18. 18.🔭 At what angle are the mirrors set in a simple periscope? (a) 180 degrees (b) 10 degrees (c) 90 degrees (d) 45 degrees
19. 19.True or false: aluminium foil reflects light poorly. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) a shiny steel plate (b) a dull brick (c) aluminium foil (d) a mirror
21. 21.🧺 Which of these is needed for the periscope? (a) a pencil (b) a balloon (c) a battery cell (d) a magnet
22. 22.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) two small mirrors (c) sticky tape (d) yeast
23. 23.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) sticky tape (c) an empty juice carton (d) a magnet
24. 24.⚖️ 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 measure it (c) we keep it the same
25. 25.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light well (b) reflects light poorly
26. 26.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
27. 27.🧺 Do we need yeast for the periscope? (a) needed (b) not needed
28. 28.🔭 Does a mirror reflect light well or poorly? (a) reflects light well (b) reflects light poorly
29. 29.True or false: an empty juice carton is not needed for the periscope. (a) True (b) False
30. 30.📘 Light bouncing off a mirror is called ___. (a) refraction (b) reflection (c) magnetism (d) evaporation
31. 31.🧺 Do we need sticky tape for the periscope? (a) not needed (b) needed
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.🔭 Does black cloth reflect light well or poorly? (a) reflects light well (b) reflects light poorly
34. 34.🔍 Which is the odd one out? (a) a dull brick (b) a mirror (c) a rough wooden board (d) dark soil
35. 35.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same mirrors”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🔍 Which is the odd one out? (a) a dull brick (b) dark soil (c) black cloth (d) still clear water
37. 37.🔭 Does a dull brick reflect light well or poorly? (a) reflects light poorly (b) reflects light well
38. 38.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) much bigger (b) upside down only (c) in colour (d) flipped left to right
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 light
40. 40.🛟 Which mirrors are safest for a children’s periscope? (a) broken glass bits (b) loose glass panes (c) big wall mirrors (d) plastic safety mirrors

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