Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 732 · 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) broken glass bits (c) loose glass panes (d) plastic safety mirrors
2. 2.🔭 Which of these reflects light poorly? (a) still clear water (b) aluminium foil (c) a shiny steel plate (d) dark soil
3. 3.🔭 What does a periscope let you do? (a) see germs (b) see over a wall (c) see in the dark (d) hear far sounds
4. 4.🔍 Which is the odd one out? (a) still clear water (b) a rough wooden board (c) dark soil (d) a dull brick
5. 5.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) flipped left to right (b) much bigger (c) upside down only (d) in colour
6. 6.🧺 Do we need an empty juice carton for the periscope? (a) not needed (b) needed
7. 7.📘 Light bouncing off a mirror is called ___. (a) magnetism (b) reflection (c) evaporation (d) refraction
8. 8.🧺 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
9. 9.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) the angle of the mirrors (b) the same light (c) the object we look at (d) how clear the view is
10. 10.🔍 Which is the odd one out? (a) dark soil (b) black cloth (c) a rough wooden board (d) aluminium foil
11. 11.🔮 Predict: you cover the top mirror with paper. What do you see? (a) two pictures (b) a rainbow (c) a brighter view (d) only darkness
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) sticky tape (c) vinegar (d) a ruler
14. 14.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) the same carton (b) the angle of the mirrors (c) how clear the view is
15. 15.🧺 Do we need two small mirrors for the periscope? (a) not needed (b) needed
16. 16.🛟 Who should cut the holes in the juice carton? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
17. 17.🔭 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
18. 18.True or false: still clear water reflects light poorly. (a) True (b) False
19. 19.True or false: aluminium foil reflects light poorly. (a) True (b) False
20. 20.🔭 Which of these reflects light well? (a) a mirror (b) dark soil (c) black cloth (d) a dull brick
21. 21.True or false: dark soil reflects light well. (a) True (b) False
22. 22.🧺 Which of these is not needed for the periscope? (a) two small mirrors (b) an empty juice carton (c) turmeric powder (d) a ruler
23. 23.🔍 Which is the odd one out? (a) a dull brick (b) a shiny steel plate (c) dark soil (d) black cloth
24. 24.🧺 Which of these is needed for the periscope? (a) sticky tape (b) yeast (c) turmeric powder (d) a magnet
25. 25.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
26. 26.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same light”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) an empty juice carton (c) vinegar (d) two small mirrors
28. 28.🛟 You must never point a periscope or a mirror at ___. (a) a tree (b) a friend’s toy (c) the Sun (d) a wall
29. 29.True or false: a balloon is needed for the periscope. (a) False (b) True
30. 30.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) a ruler (c) a magnet (d) a pencil
31. 31.🔭 Does dark soil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
32. 32.🔭 How many times does light bounce off a mirror in a simple periscope?
33. 33.True or false: a pencil is needed for the periscope. (a) False (b) True
34. 34.🔭 Which of these reflects light well? (a) still clear water (b) black cloth (c) a dull brick (d) a rough wooden board
35. 35.🧺 Which of these is not needed for the periscope? (a) two small mirrors (b) sticky tape (c) a pencil (d) a battery cell
36. 36.True or false: vinegar is not needed for the periscope. (a) False (b) True
37. 37.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the same mirrors (b) the same carton (c) how clear the view is (d) the same light
38. 38.True or false: black cloth reflects light poorly. (a) False (b) True
39. 39.True or false: a magnet is not needed for the periscope. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a dull brick (b) a mirror (c) black cloth (d) dark soil

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