Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 300 · 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.True or false: still clear water reflects light well. (a) False (b) True
2. 2.True or false: sticky tape is not needed for the periscope. (a) False (b) True
3. 3.🛟 You must never point a periscope or a mirror at ___. (a) a friend’s toy (b) a wall (c) a tree (d) the Sun
4. 4.🔭 How many mirrors does a simple periscope use?
5. 5.🧺 Do we need two small mirrors for the periscope? (a) not needed (b) needed
6. 6.True or false: black cloth reflects light poorly. (a) True (b) False
7. 7.🛟 Which mirrors are safest for a children’s periscope? (a) loose glass panes (b) big wall mirrors (c) broken glass bits (d) plastic safety mirrors
8. 8.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) two small mirrors (c) a ruler (d) yeast
9. 9.🧺 Do we need vinegar for the periscope? (a) needed (b) not needed
10. 10.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.True or false: turmeric powder is needed for the periscope. (a) True (b) False
12. 12.🔭 Which of these reflects light well? (a) dark soil (b) a rough wooden board (c) black cloth (d) aluminium foil
13. 13.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a rainbow (b) a brighter view (c) two pictures (d) only darkness
14. 14.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a balloon (b) a ruler (c) an empty juice carton (d) a pencil
15. 15.⚖️ 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 light (b) the object we look at (c) the angle of the mirrors (d) the same mirrors
16. 16.📘 Light bouncing off a mirror is called ___. (a) reflection (b) magnetism (c) refraction (d) evaporation
17. 17.🔍 Which is the odd one out? (a) still clear water (b) a mirror (c) black cloth (d) a shiny steel plate
18. 18.🧺 Which of these is needed for the periscope? (a) yeast (b) turmeric powder (c) a balloon (d) two small mirrors
19. 19.True or false: yeast is not needed for the periscope. (a) False (b) True
20. 20.🔭 Which of these reflects light well? (a) a shiny steel plate (b) a rough wooden board (c) a dull brick (d) black cloth
21. 21.True or false: black cloth reflects light well. (a) True (b) False
22. 22.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) an empty juice carton (c) turmeric powder (d) two small mirrors
23. 23.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the angle of the mirrors is kept the same. (a) False (b) True
24. 24.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) vinegar (b) a ruler (c) an empty juice carton (d) two small mirrors
25. 25.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) a pencil (c) yeast (d) a ruler
26. 26.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) flipped left to right (b) in colour (c) much bigger (d) upside down only
27. 27.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) the object we look at (b) the angle of the mirrors (c) how clear the view is
28. 28.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light poorly (b) reflects light well
29. 29.🧺 Do we need sticky tape for the periscope? (a) not needed (b) needed
30. 30.🔭 Who uses a periscope to look above the water? (a) a farmer (b) a baker (c) a pilot in a plane (d) a submarine crew
31. 31.True or false: a battery cell is not needed for the periscope. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a shiny steel plate (b) a dull brick (c) still clear water (d) a mirror
33. 33.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) so light reaches the eye (c) so it can float (d) to make it heavy
34. 34.🔭 At what angle are the mirrors set in a simple periscope? (a) 90 degrees (b) 180 degrees (c) 10 degrees (d) 45 degrees
35. 35.🧺 Which of these is needed for the periscope? (a) a balloon (b) a magnet (c) a battery cell (d) a ruler
36. 36.🔭 Does dark soil reflect light well or poorly? (a) reflects light poorly (b) reflects light well
37. 37.🔭 Does still clear water reflect light well or poorly? (a) reflects light well (b) reflects light poorly
38. 38.🧺 Which of these is needed for the periscope? (a) a magnet (b) turmeric powder (c) a battery cell (d) a pencil
39. 39.🛟 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
40. 40.🔭 Which of these reflects light well? (a) dark soil (b) a mirror (c) black cloth (d) a dull brick

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