Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 751 · 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? Which of these is what we measure? (a) the same carton (b) the same light (c) how clear the view is (d) the object we look at
2. 2.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we change it (b) we keep it the same (c) we measure it
3. 3.🔭 Which of these reflects light poorly? (a) still clear water (b) a mirror (c) aluminium foil (d) black cloth
4. 4.🧺 Do we need a battery cell for the periscope? (a) needed (b) not needed
5. 5.⚖️ 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 change it (c) we keep it the same
6. 6.⚖️ 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 object we look at (d) the same mirrors
7. 7.🧺 Which of these is needed for the periscope? (a) yeast (b) a battery cell (c) a ruler (d) a magnet
8. 8.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) upside down only (b) flipped left to right (c) in colour (d) much bigger
9. 9.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a rainbow (b) two pictures (c) a brighter view (d) only darkness
10. 10.🧺 Do we need a pencil for the periscope? (a) needed (b) not needed
11. 11.🔭 Which of these reflects light well? (a) a dull brick (b) black cloth (c) a rough wooden board (d) still clear water
12. 12.🔭 Does a dull brick reflect light well or poorly? (a) reflects light well (b) reflects light poorly
13. 13.🔍 Which is the odd one out? (a) dark soil (b) aluminium foil (c) a shiny steel plate (d) still clear water
14. 14.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) a ruler (c) turmeric powder (d) an empty juice carton
15. 15.🧺 Do we need two small mirrors for the periscope? (a) not needed (b) needed
16. 16.🧺 Do we need turmeric powder for the periscope? (a) needed (b) not needed
17. 17.True or false: dark soil reflects light well. (a) True (b) False
18. 18.⚖️ 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 change it (c) we keep it the same
19. 19.True or false: vinegar is not needed for the periscope. (a) True (b) False
20. 20.True or false: turmeric powder is not needed for the periscope. (a) True (b) False
21. 21.🔭 How many mirrors does a simple periscope use?
22. 22.🔭 At what angle are the mirrors set in a simple periscope? (a) 180 degrees (b) 90 degrees (c) 45 degrees (d) 10 degrees
23. 23.🧺 Do we need vinegar for the periscope? (a) needed (b) not needed
24. 24.🔭 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
25. 25.True or false: a rough wooden board reflects light well. (a) True (b) False
26. 26.True or false: still clear water reflects light well. (a) False (b) True
27. 27.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) vinegar (b) two small mirrors (c) a pencil (d) a ruler
28. 28.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same light is what we measure. (a) True (b) False
29. 29.True or false: a shiny steel plate reflects light poorly. (a) True (b) False
30. 30.True or false: an empty juice carton is not needed for the periscope. (a) True (b) False
31. 31.🛟 Which mirrors are safest for a children’s periscope? (a) plastic safety mirrors (b) broken glass bits (c) loose glass panes (d) big wall mirrors
32. 32.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a battery cell (b) an empty juice carton (c) a pencil (d) sticky tape
33. 33.True or false: aluminium foil reflects light poorly. (a) True (b) False
34. 34.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same light is kept the same. (a) False (b) True
35. 35.🧺 Do we need yeast for the periscope? (a) not needed (b) needed
36. 36.🔭 How many times does light bounce off a mirror in a simple periscope?
37. 37.🛟 Who should cut the holes in the juice carton? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
38. 38.True or false: an empty juice carton is needed for the periscope. (a) False (b) True
39. 39.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a balloon (b) two small mirrors (c) a ruler (d) an empty juice carton
40. 40.🛟 You must never point a periscope or a mirror at ___. (a) a wall (b) a tree (c) the Sun (d) a friend’s toy

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