Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 833 · 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 mirrors are safest for a children’s periscope? (a) big wall mirrors (b) loose glass panes (c) broken glass bits (d) plastic safety mirrors
2. 2.🔭 What does a periscope let you do? (a) see germs (b) hear far sounds (c) see in the dark (d) see over a wall
3. 3.🔭 How many times does light bounce off a mirror in a simple periscope?
4. 4.True or false: a ruler is needed for the periscope. (a) True (b) False
5. 5.📘 Light bouncing off a mirror is called ___. (a) evaporation (b) reflection (c) refraction (d) magnetism
6. 6.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) a pencil (c) an empty juice carton (d) yeast
7. 7.True or false: still clear water reflects light poorly. (a) True (b) False
8. 8.True or false: a shiny steel plate reflects light poorly. (a) False (b) True
9. 9.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) only short walls (b) nothing at all (c) the ground (d) taller walls
10. 10.True or false: turmeric powder is not needed for the periscope. (a) False (b) True
11. 11.⚖️ 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 measure it (b) we keep it the same (c) we change it
12. 12.🔍 Which is the odd one out? (a) aluminium foil (b) dark soil (c) a rough wooden board (d) a dull brick
13. 13.🛟 Who should cut the holes in the juice carton? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
14. 14.🔭 Does a mirror reflect light well or poorly? (a) reflects light well (b) reflects light poorly
15. 15.🔮 Predict: you cover the top mirror with paper. What do you see? (a) only darkness (b) a rainbow (c) a brighter view (d) two pictures
16. 16.🔭 Does dark soil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
17. 17.🔍 Which is the odd one out? (a) a mirror (b) still clear water (c) aluminium foil (d) a rough wooden board
18. 18.🧺 Which of these is not needed for the periscope? (a) turmeric powder (b) an empty juice carton (c) a ruler (d) sticky tape
19. 19.True or false: black cloth reflects light well. (a) False (b) True
20. 20.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) a pencil (c) two small mirrors (d) a battery cell
21. 21.🔭 How many mirrors does a simple periscope use?
22. 22.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light well (b) reflects light poorly
23. 23.🧺 Do we need a battery cell for the periscope? (a) not needed (b) needed
24. 24.🔭 At what angle are the mirrors set in a simple periscope? (a) 10 degrees (b) 45 degrees (c) 180 degrees (d) 90 degrees
25. 25.🔭 Why must the two mirrors face each other and be parallel? (a) so light reaches the eye (b) so it looks shiny (c) to make it heavy (d) so it can float
26. 26.🔭 Which of these reflects light well? (a) dark soil (b) a rough wooden board (c) a dull brick (d) a mirror
27. 27.⚖️ 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
28. 28.🧺 Do we need a balloon for the periscope? (a) needed (b) not needed
29. 29.True or false: sticky tape is needed for the periscope. (a) False (b) True
30. 30.⚖️ 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 same mirrors (d) how clear the view is
31. 31.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is kept the same. (a) False (b) True
32. 32.True or false: a ruler is not needed for the periscope. (a) True (b) False
33. 33.🔭 Does still clear water reflect light well or poorly? (a) reflects light well (b) reflects light poorly
34. 34.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same mirrors is the one thing we change. (a) False (b) True
35. 35.🧺 Do we need two small mirrors for the periscope? (a) needed (b) not needed
36. 36.🔭 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
37. 37.🔭 Does a dull brick reflect light well or poorly? (a) reflects light well (b) reflects light poorly
38. 38.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) in colour (b) much bigger (c) flipped left to right (d) upside down only
39. 39.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) how clear the view is (b) the angle of the mirrors (c) the same light
40. 40.🧺 Which of these is needed for the periscope? (a) a magnet (b) a ruler (c) a balloon (d) vinegar

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