Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 7 · 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 can float (b) so light reaches the eye (c) to make it heavy (d) so it looks shiny
2. 2.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: how clear the view is is what we measure. (a) True (b) False
3. 3.⚖️ 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 same light (c) the angle of the mirrors
4. 4.🧺 Do we need turmeric powder for the periscope? (a) needed (b) not needed
5. 5.🔭 Which of these reflects light well? (a) black cloth (b) dark soil (c) a rough wooden board (d) still clear water
6. 6.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light well (b) reflects light poorly
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.🧺 Do we need vinegar for the periscope? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) vinegar (c) two small mirrors (d) a pencil
10. 10.True or false: two small mirrors is needed for the periscope. (a) True (b) False
11. 11.⚖️ 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
12. 12.True or false: a pencil is needed for the periscope. (a) False (b) True
13. 13.🧺 Do we need yeast for the periscope? (a) needed (b) not needed
14. 14.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is the one thing we change. (a) True (b) False
15. 15.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same mirrors”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.True or false: yeast is not needed for the periscope. (a) True (b) False
18. 18.🧺 Do we need a balloon for the periscope? (a) not needed (b) needed
19. 19.🛟 Which mirrors are safest for a children’s periscope? (a) big wall mirrors (b) plastic safety mirrors (c) loose glass panes (d) broken glass bits
20. 20.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a battery cell (b) an empty juice carton (c) sticky tape (d) a ruler
21. 21.⚖️ 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
22. 22.🔭 How many times does light bounce off a mirror in a simple periscope?
23. 23.⚖️ 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) how clear the view is (c) the same carton
24. 24.🔭 Which of these reflects light poorly? (a) black cloth (b) a mirror (c) a shiny steel plate (d) still clear water
25. 25.🔭 Which of these reflects light well? (a) a shiny steel plate (b) dark soil (c) black cloth (d) a dull brick
26. 26.🧺 Which of these is needed for the periscope? (a) turmeric powder (b) a magnet (c) a ruler (d) a balloon
27. 27.⚖️ 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
28. 28.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) the same carton (b) the angle of the mirrors (c) the same mirrors (d) the same light
29. 29.🔭 At what angle are the mirrors set in a simple periscope? (a) 10 degrees (b) 90 degrees (c) 45 degrees (d) 180 degrees
30. 30.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) turmeric powder (c) a ruler (d) sticky tape
31. 31.🔭 Does a mirror reflect light well or poorly? (a) reflects light poorly (b) reflects light well
32. 32.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same mirrors is kept the same. (a) True (b) False
33. 33.True or false: a mirror reflects light poorly. (a) True (b) False
34. 34.🔭 Does a rough wooden board reflect light well or poorly? (a) reflects light poorly (b) reflects light well
35. 35.⚖️ 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 object we look at (c) the angle of the mirrors
36. 36.🔭 How many mirrors does a simple periscope use?
37. 37.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
38. 38.📘 Light bouncing off a mirror is called ___. (a) evaporation (b) refraction (c) magnetism (d) reflection
39. 39.🔍 Which is the odd one out? (a) a rough wooden board (b) a dull brick (c) dark soil (d) still clear water
40. 40.🧺 Which of these is needed for the periscope? (a) a pencil (b) a balloon (c) a magnet (d) turmeric powder

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