Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 413 · 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.🧺 Do we need a pencil for the periscope? (a) needed (b) not needed
2. 2.🧺 Which of these is not needed for the periscope? (a) a balloon (b) two small mirrors (c) a ruler (d) a pencil
3. 3.🛟 Which mirrors are safest for a children’s periscope? (a) broken glass bits (b) loose glass panes (c) big wall mirrors (d) plastic safety mirrors
4. 4.🔭 Does a rough wooden board reflect light well or poorly? (a) reflects light poorly (b) reflects light well
5. 5.🔭 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
6. 6.🔭 Which of these reflects light well? (a) black cloth (b) a shiny steel plate (c) a rough wooden board (d) dark soil
7. 7.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the angle of the mirrors is the one thing we change. (a) True (b) False
8. 8.🔭 Which of these reflects light poorly? (a) a rough wooden board (b) a shiny steel plate (c) a mirror (d) still clear water
9. 9.🔭 How many mirrors does a simple periscope use?
10. 10.🔭 Which of these reflects light well? (a) dark soil (b) aluminium foil (c) a rough wooden board (d) black cloth
11. 11.🔭 Which of these reflects light well? (a) a mirror (b) a rough wooden board (c) a dull brick (d) black cloth
12. 12.True or false: vinegar is not needed for the periscope. (a) True (b) False
13. 13.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) the object we look at (b) the same carton (c) the angle of the mirrors (d) the same mirrors
14. 14.🔭 How many times does light bounce off a mirror in a simple periscope?
15. 15.🧺 Which of these is needed for the periscope? (a) a battery cell (b) an empty juice carton (c) yeast (d) turmeric powder
16. 16.🔭 Which of these reflects light well? (a) a dull brick (b) a rough wooden board (c) still clear water (d) dark soil
17. 17.True or false: sticky tape is not needed for the periscope. (a) True (b) False
18. 18.🧺 Which of these is needed for the periscope? (a) vinegar (b) a pencil (c) a balloon (d) a magnet
19. 19.🔍 Which is the odd one out? (a) a shiny steel plate (b) a dull brick (c) a mirror (d) aluminium foil
20. 20.True or false: dark soil reflects light well. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a dull brick (b) still clear water (c) a rough wooden board (d) black cloth
22. 22.🧺 Which of these is needed for the periscope? (a) a balloon (b) a magnet (c) sticky tape (d) yeast
23. 23.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a brighter view (b) a rainbow (c) two pictures (d) only darkness
24. 24.🔭 Who uses a periscope to look above the water? (a) a pilot in a plane (b) a farmer (c) a baker (d) a submarine crew
25. 25.🛟 You must never point a periscope or a mirror at ___. (a) a tree (b) a friend’s toy (c) a wall (d) the Sun
26. 26.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
27. 27.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) upside down only (b) in colour (c) much bigger (d) flipped left to right
28. 28.⚖️ 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 angle of the mirrors
29. 29.True or false: sticky tape is needed for the periscope. (a) True (b) False
30. 30.True or false: still clear water reflects light well. (a) True (b) False
31. 31.🔭 At what angle are the mirrors set in a simple periscope? (a) 10 degrees (b) 90 degrees (c) 180 degrees (d) 45 degrees
32. 32.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) the ground (b) only short walls (c) taller walls (d) nothing at all
33. 33.True or false: a rough wooden board reflects light poorly. (a) False (b) True
34. 34.🔭 What does a periscope let you do? (a) see over a wall (b) see germs (c) hear far sounds (d) see in the dark
35. 35.⚖️ 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 change it (b) we keep it the same (c) we measure it
36. 36.True or false: a shiny steel plate reflects light well. (a) True (b) False
37. 37.True or false: still clear water reflects light poorly. (a) True (b) False
38. 38.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) vinegar (c) an empty juice carton (d) a ruler
39. 39.⚖️ 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
40. 40.⚖️ 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) True (b) False

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