Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 969 · 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.🔭 Why must the two mirrors face each other and be parallel? (a) so light reaches the eye (b) to make it heavy (c) so it can float (d) so it looks shiny
2. 2.🧺 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) a battery cell
3. 3.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) the same light (b) the angle of the mirrors (c) how clear the view is
4. 4.🔭 How many times does light bounce off a mirror in a simple periscope?
5. 5.🔭 Which of these reflects light poorly? (a) a dull brick (b) still clear water (c) aluminium foil (d) a shiny steel plate
6. 6.🔮 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
7. 7.⚖️ 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 mirrors (d) the angle of the mirrors
8. 8.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
9. 9.True or false: aluminium foil reflects light well. (a) False (b) True
10. 10.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a ruler (c) sticky tape (d) vinegar
11. 11.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same mirrors”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) yeast (c) sticky tape (d) a pencil
13. 13.📘 Light bouncing off a mirror is called ___. (a) magnetism (b) evaporation (c) reflection (d) refraction
14. 14.⚖️ 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) how clear the view is (c) the same carton (d) the angle of the mirrors
15. 15.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) a balloon (c) a ruler (d) an empty juice carton
16. 16.🧺 Which of these is needed for the periscope? (a) a pencil (b) yeast (c) vinegar (d) turmeric powder
17. 17.True or false: black cloth reflects light well. (a) False (b) True
18. 18.🔭 Which of these reflects light poorly? (a) a mirror (b) aluminium foil (c) still clear water (d) dark soil
19. 19.🛟 You must never point a periscope or a mirror at ___. (a) a friend’s toy (b) a tree (c) the Sun (d) a wall
20. 20.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is the one thing we change. (a) False (b) True
21. 21.True or false: sticky tape is not needed for the periscope. (a) False (b) True
22. 22.🧺 Do we need sticky tape for the periscope? (a) not needed (b) needed
23. 23.🔭 Who uses a periscope to look above the water? (a) a pilot in a plane (b) a farmer (c) a submarine crew (d) a baker
24. 24.True or false: a balloon is needed for the periscope. (a) True (b) False
25. 25.True or false: turmeric powder is needed for the periscope. (a) True (b) False
26. 26.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) the angle of the mirrors (b) how clear the view is (c) the same carton
27. 27.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) turmeric powder (c) two small mirrors (d) sticky tape
28. 28.🧺 Do we need yeast for the periscope? (a) not needed (b) needed
29. 29.🔍 Which is the odd one out? (a) a mirror (b) black cloth (c) a dull brick (d) a rough wooden board
30. 30.🧺 Do we need vinegar for the periscope? (a) needed (b) not needed
31. 31.🧺 Do we need a battery cell for the periscope? (a) not needed (b) needed
32. 32.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
33. 33.🧺 Do we need a pencil for the periscope? (a) not needed (b) needed
34. 34.🔭 Which of these reflects light well? (a) aluminium foil (b) black cloth (c) a dull brick (d) dark soil
35. 35.🔍 Which is the odd one out? (a) a rough wooden board (b) aluminium foil (c) black cloth (d) a dull brick
36. 36.⚖️ 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 object we look at (c) the angle of the mirrors
37. 37.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) a magnet (c) sticky tape (d) an empty juice carton
38. 38.True or false: two small mirrors is needed for the periscope. (a) False (b) True
39. 39.🧺 Which of these is needed for the periscope? (a) turmeric powder (b) a balloon (c) a ruler (d) vinegar
40. 40.🛟 Which mirrors are safest for a children’s periscope? (a) big wall mirrors (b) plastic safety mirrors (c) loose glass panes (d) broken glass bits

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