Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 792 · 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.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) vinegar (b) two small mirrors (c) an empty juice carton (d) a pencil
2. 2.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) the ground (b) nothing at all (c) taller walls (d) only short walls
3. 3.True or false: a dull brick reflects light well. (a) False (b) True
4. 4.🧺 Which of these is not needed for the periscope? (a) a pencil (b) an empty juice carton (c) vinegar (d) sticky tape
5. 5.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is what we measure. (a) True (b) False
6. 6.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light well (b) reflects light poorly
7. 7.True or false: aluminium foil reflects light well. (a) True (b) False
8. 8.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) yeast (c) two small mirrors (d) an empty juice carton
9. 9.🛟 You must never point a periscope or a mirror at ___. (a) a tree (b) a friend’s toy (c) a wall (d) the Sun
10. 10.🔭 How many times does light bounce off a mirror in a simple periscope?
11. 11.True or false: a ruler is needed for the periscope. (a) False (b) True
12. 12.🧺 Which of these is not needed for the periscope? (a) a battery cell (b) an empty juice carton (c) sticky tape (d) two small mirrors
13. 13.🧺 Do we need a pencil for the periscope? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a pencil (c) sticky tape (d) a balloon
15. 15.True or false: a shiny steel plate reflects light well. (a) True (b) False
16. 16.🔭 How many mirrors does a simple periscope use?
17. 17.🔍 Which is the odd one out? (a) a shiny steel plate (b) a mirror (c) black cloth (d) still clear water
18. 18.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a brighter view (b) a rainbow (c) two pictures (d) only darkness
19. 19.🔭 Which of these reflects light poorly? (a) a shiny steel plate (b) still clear water (c) a dull brick (d) a mirror
20. 20.🔭 Does still clear water reflect light well or poorly? (a) reflects light well (b) reflects light poorly
21. 21.🛟 Who should cut the holes in the juice carton? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
22. 22.True or false: a rough wooden board reflects light well. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) black cloth (b) a dull brick (c) a mirror (d) a rough wooden board
24. 24.🔭 Which of these reflects light well? (a) black cloth (b) a dull brick (c) a mirror (d) a rough wooden board
25. 25.⚖️ 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 keep it the same (c) we change it
26. 26.True or false: still clear water reflects light well. (a) False (b) True
27. 27.True or false: turmeric powder is not needed for the periscope. (a) False (b) True
28. 28.📘 Light bouncing off a mirror is called ___. (a) refraction (b) magnetism (c) evaporation (d) reflection
29. 29.🧺 Do we need an empty juice carton for the periscope? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) turmeric powder (c) an empty juice carton (d) two small mirrors
31. 31.True or false: still clear water reflects light poorly. (a) False (b) True
32. 32.🛟 Which mirrors are safest for a children’s periscope? (a) loose glass panes (b) plastic safety mirrors (c) broken glass bits (d) big wall mirrors
33. 33.True or false: black cloth reflects light poorly. (a) False (b) True
34. 34.🔭 Does a dull brick reflect light well or poorly? (a) reflects light poorly (b) reflects light well
35. 35.🧺 Which of these is needed for the periscope? (a) an empty juice carton (b) yeast (c) turmeric powder (d) a battery cell
36. 36.⚖️ 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 carton (c) the same light (d) the object we look at
37. 37.🧺 Do we need a battery cell for the periscope? (a) needed (b) not needed
38. 38.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the object we look at is kept the same. (a) False (b) True
39. 39.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same mirrors”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.True or false: a pencil is not needed for the periscope. (a) True (b) False

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