Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 434 · 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.🔭 Which of these reflects light well? (a) a rough wooden board (b) a dull brick (c) black cloth (d) a mirror
2. 2.⚖️ 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
3. 3.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) a pencil (c) a magnet (d) a ruler
4. 4.True or false: dark soil reflects light well. (a) False (b) True
5. 5.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) a ruler (c) an empty juice carton (d) yeast
6. 6.🔭 Does black cloth reflect light well or poorly? (a) reflects light well (b) reflects light poorly
7. 7.🔭 Which of these reflects light poorly? (a) a mirror (b) aluminium foil (c) black cloth (d) still clear water
8. 8.⚖️ 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 measure it (c) we change it
9. 9.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) taller walls (b) nothing at all (c) only short walls (d) the ground
10. 10.🔭 How many mirrors does a simple periscope use?
11. 11.🔭 Does a dull brick reflect light well or poorly? (a) reflects light well (b) reflects light poorly
12. 12.🔭 Which of these reflects light well? (a) a rough wooden board (b) a shiny steel plate (c) a dull brick (d) dark soil
13. 13.🔮 Predict: you cover the top mirror with paper. What do you see? (a) two pictures (b) a brighter view (c) a rainbow (d) only darkness
14. 14.🧺 Do we need a pencil for the periscope? (a) not needed (b) needed
15. 15.True or false: a balloon is not needed for the periscope. (a) False (b) True
16. 16.🔭 Who uses a periscope to look above the water? (a) a baker (b) a pilot in a plane (c) a submarine crew (d) a farmer
17. 17.True or false: a mirror reflects light well. (a) False (b) True
18. 18.🧺 Which of these is needed for the periscope? (a) a magnet (b) yeast (c) turmeric powder (d) an empty juice carton
19. 19.🔭 Which of these reflects light well? (a) a dull brick (b) still clear water (c) black cloth (d) a rough wooden board
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a balloon (b) a ruler (c) a pencil (d) sticky tape
22. 22.⚖️ 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
23. 23.🧺 Do we need sticky tape for the periscope? (a) needed (b) not needed
24. 24.True or false: vinegar is needed for the periscope. (a) True (b) False
25. 25.True or false: a pencil is needed for the periscope. (a) True (b) False
26. 26.🔭 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
27. 27.🔭 At what angle are the mirrors set in a simple periscope? (a) 10 degrees (b) 90 degrees (c) 45 degrees (d) 180 degrees
28. 28.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) in colour (b) much bigger (c) upside down only (d) flipped left to right
29. 29.True or false: a mirror reflects light poorly. (a) True (b) False
30. 30.True or false: still clear water reflects light well. (a) False (b) True
31. 31.🧺 Which of these is needed for the periscope? (a) two small mirrors (b) a balloon (c) vinegar (d) yeast
32. 32.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) an empty juice carton (c) vinegar (d) two small mirrors
33. 33.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light poorly (b) reflects light well
34. 34.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) how clear the view is (b) the object we look at (c) the same light (d) the same carton
35. 35.True or false: a pencil is not needed for the periscope. (a) False (b) True
36. 36.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) two small mirrors (c) sticky tape (d) a balloon
37. 37.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) vinegar (c) a ruler (d) an empty juice carton
38. 38.🛟 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
39. 39.🔭 Does a rough wooden board reflect light well or poorly? (a) reflects light poorly (b) reflects light well
40. 40.🔍 Which is the odd one out? (a) still clear water (b) aluminium foil (c) a shiny steel plate (d) a rough wooden board

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