Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 90 · 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.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same light”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) nothing at all (b) taller walls (c) the ground (d) only short walls
3. 3.🔭 Which of these reflects light poorly? (a) still clear water (b) a dull brick (c) a shiny steel plate (d) a mirror
4. 4.True or false: dark soil reflects light well. (a) True (b) False
5. 5.🔭 Why must the two mirrors face each other and be parallel? (a) so it can float (b) so it looks shiny (c) so light reaches the eye (d) to make it heavy
6. 6.🔮 Predict: you cover the top mirror with paper. What do you see? (a) two pictures (b) a rainbow (c) only darkness (d) a brighter view
7. 7.True or false: a shiny steel plate reflects light well. (a) False (b) True
8. 8.🧺 Which of these is needed for the periscope? (a) a pencil (b) yeast (c) a balloon (d) vinegar
9. 9.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
10. 10.🔭 How many mirrors does a simple periscope use?
11. 11.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) in colour (b) upside down only (c) much bigger (d) flipped left to right
12. 12.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light poorly (b) reflects light well
13. 13.🔭 Does still clear water reflect light well or poorly? (a) reflects light well (b) reflects light poorly
14. 14.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: how clear the view is is the one thing we change. (a) False (b) True
15. 15.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) yeast (b) an empty juice carton (c) sticky tape (d) a pencil
16. 16.🧺 Do we need sticky tape for the periscope? (a) not needed (b) needed
17. 17.⚖️ 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 mirrors
18. 18.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) an empty juice carton (c) two small mirrors (d) turmeric powder
19. 19.🔭 Which of these reflects light poorly? (a) a shiny steel plate (b) aluminium foil (c) a mirror (d) a rough wooden board
20. 20.True or false: a magnet is not needed for the periscope. (a) True (b) False
21. 21.🧺 Do we need turmeric powder for the periscope? (a) needed (b) not needed
22. 22.🔍 Which is the odd one out? (a) black cloth (b) a dull brick (c) still clear water (d) dark soil
23. 23.True or false: a battery cell is not needed for the periscope. (a) True (b) False
24. 24.🔭 How many times does light bounce off a mirror in a simple periscope?
25. 25.🔍 Which is the odd one out? (a) black cloth (b) aluminium foil (c) dark soil (d) a dull brick
26. 26.🔭 At what angle are the mirrors set in a simple periscope? (a) 180 degrees (b) 90 degrees (c) 45 degrees (d) 10 degrees
27. 27.True or false: still clear water reflects light poorly. (a) False (b) True
28. 28.🧺 Do we need a balloon for the periscope? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the periscope? (a) two small mirrors (b) a ruler (c) a pencil (d) a battery cell
30. 30.🛟 Which mirrors are safest for a children’s periscope? (a) plastic safety mirrors (b) broken glass bits (c) big wall mirrors (d) loose glass panes
31. 31.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is what we measure. (a) False (b) True
32. 32.True or false: an empty juice carton is needed for the periscope. (a) False (b) True
33. 33.🧺 Which of these is needed for the periscope? (a) an empty juice carton (b) turmeric powder (c) a balloon (d) yeast
34. 34.🧺 Do we need a ruler for the periscope? (a) needed (b) not needed
35. 35.🧺 Do we need two small mirrors for the periscope? (a) not needed (b) needed
36. 36.📘 Light bouncing off a mirror is called ___. (a) evaporation (b) reflection (c) refraction (d) magnetism
37. 37.True or false: a pencil is needed for the periscope. (a) False (b) True
38. 38.🔭 Does a mirror reflect light well or poorly? (a) reflects light poorly (b) reflects light well
39. 39.True or false: a ruler is needed for the periscope. (a) False (b) True
40. 40.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a battery cell (c) sticky tape (d) a pencil

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