Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 689 · 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) a ruler (b) a battery cell (c) two small mirrors (d) an empty juice carton
2. 2.🛟 Which mirrors are safest for a children’s periscope? (a) plastic safety mirrors (b) big wall mirrors (c) loose glass panes (d) broken glass bits
3. 3.🔭 Which of these reflects light well? (a) still clear water (b) black cloth (c) dark soil (d) a dull brick
4. 4.🔭 Does still clear water reflect light well or poorly? (a) reflects light poorly (b) reflects light well
5. 5.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) upside down only (b) much bigger (c) flipped left to right (d) in colour
6. 6.True or false: a shiny steel plate reflects light poorly. (a) True (b) False
7. 7.True or false: vinegar is needed for the periscope. (a) False (b) True
8. 8.🧺 Which of these is needed for the periscope? (a) vinegar (b) yeast (c) a balloon (d) a pencil
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.🔭 Which of these reflects light well? (a) a dull brick (b) black cloth (c) aluminium foil (d) dark soil
11. 11.🔭 Which of these reflects light poorly? (a) still clear water (b) aluminium foil (c) a rough wooden board (d) a shiny steel plate
12. 12.True or false: sticky tape is not needed for the periscope. (a) True (b) False
13. 13.True or false: yeast is not needed for the periscope. (a) False (b) True
14. 14.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the object we look at 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 “how clear the view is”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.🛟 You must never point a periscope or a mirror at ___. (a) a friend’s toy (b) the Sun (c) a wall (d) a tree
17. 17.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light poorly (b) reflects light well
18. 18.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
19. 19.🔭 How many times does light bounce off a mirror in a simple periscope?
20. 20.True or false: sticky tape is needed for the periscope. (a) False (b) True
21. 21.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) sticky tape (c) a balloon (d) a pencil
22. 22.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) so it can float (c) so light reaches the eye (d) to make it heavy
23. 23.🔍 Which is the odd one out? (a) a rough wooden board (b) a dull brick (c) black cloth (d) a shiny steel plate
24. 24.True or false: vinegar is not needed for the periscope. (a) True (b) False
25. 25.⚖️ 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) False (b) True
26. 26.🔭 How many mirrors does a simple periscope use?
27. 27.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) a pencil (c) turmeric powder (d) an empty juice carton
28. 28.🧺 Do we need sticky tape for the periscope? (a) needed (b) not needed
29. 29.🔭 Does a mirror reflect light well or poorly? (a) reflects light poorly (b) reflects light well
30. 30.🔍 Which is the odd one out? (a) a rough wooden board (b) a mirror (c) a shiny steel plate (d) aluminium foil
31. 31.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) the ground (b) taller walls (c) nothing at all (d) only short walls
32. 32.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a brighter view (b) only darkness (c) a rainbow (d) two pictures
33. 33.🧺 Which of these is needed for the periscope? (a) a balloon (b) an empty juice carton (c) vinegar (d) a magnet
34. 34.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) a pencil (c) two small mirrors (d) a battery cell
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 of these reflects light poorly? (a) dark soil (b) a mirror (c) aluminium foil (d) a shiny steel plate
37. 37.True or false: an empty juice carton is not needed for the periscope. (a) True (b) False
38. 38.🔭 Does a dull brick reflect light well or poorly? (a) reflects light well (b) reflects light poorly
39. 39.⚖️ 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) False (b) True
40. 40.🧺 Which of these is needed for the periscope? (a) two small mirrors (b) a balloon (c) yeast (d) a battery cell

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