Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 16 · 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.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a rainbow (b) only darkness (c) a brighter view (d) two pictures
2. 2.⚖️ 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 change it (b) we measure it (c) we keep it the same
3. 3.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light poorly (b) reflects light well
4. 4.🔭 What does a periscope let you do? (a) see germs (b) see in the dark (c) hear far sounds (d) see over a wall
5. 5.True or false: a rough wooden board reflects light poorly. (a) False (b) True
6. 6.True or false: an empty juice carton is needed for the periscope. (a) False (b) True
7. 7.⚖️ 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 change it (c) we measure it
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) two small mirrors (c) a balloon (d) an empty juice carton
10. 10.🔭 How many mirrors does a simple periscope use?
11. 11.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the object we look at (b) how clear the view is (c) the same mirrors (d) the same carton
12. 12.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same mirrors”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🧺 Which of these is needed for the periscope? (a) two small mirrors (b) turmeric powder (c) vinegar (d) a magnet
14. 14.🔭 Which of these reflects light well? (a) a rough wooden board (b) aluminium foil (c) a dull brick (d) dark soil
15. 15.🔍 Which is the odd one out? (a) a mirror (b) a rough wooden board (c) black cloth (d) a dull brick
16. 16.True or false: a mirror reflects light poorly. (a) True (b) False
17. 17.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a ruler (c) a battery cell (d) a pencil
18. 18.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) flipped left to right (b) in colour (c) much bigger (d) upside down only
19. 19.🔭 How many times does light bounce off a mirror in a simple periscope?
20. 20.🛟 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
21. 21.🔭 Which of these reflects light poorly? (a) aluminium foil (b) a shiny steel plate (c) a dull brick (d) still clear water
22. 22.True or false: a balloon is not needed for the periscope. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) a mirror (b) still clear water (c) a dull brick (d) aluminium foil
24. 24.🔭 Which of these reflects light well? (a) dark soil (b) a shiny steel plate (c) a rough wooden board (d) a dull brick
25. 25.🔭 Which of these reflects light well? (a) dark soil (b) a dull brick (c) a mirror (d) black cloth
26. 26.🧺 Which of these is not needed for the periscope? (a) vinegar (b) two small mirrors (c) a ruler (d) an empty juice carton
27. 27.🔭 Why must the two mirrors face each other and be parallel? (a) so it can float (b) to make it heavy (c) so light reaches the eye (d) so it looks shiny
28. 28.🔭 At what angle are the mirrors set in a simple periscope? (a) 90 degrees (b) 10 degrees (c) 45 degrees (d) 180 degrees
29. 29.🧺 Do we need a ruler for the periscope? (a) needed (b) not needed
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 object we look at (b) how clear the view is (c) the same mirrors (d) the angle of the mirrors
31. 31.True or false: a rough wooden board reflects light well. (a) False (b) True
32. 32.True or false: black cloth reflects light poorly. (a) False (b) True
33. 33.🔭 Which of these reflects light poorly? (a) still clear water (b) a shiny steel plate (c) dark soil (d) aluminium foil
34. 34.🔭 Who uses a periscope to look above the water? (a) a submarine crew (b) a pilot in a plane (c) a baker (d) a farmer
35. 35.True or false: vinegar is needed for the periscope. (a) True (b) False
36. 36.⚖️ 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
37. 37.True or false: a magnet is not needed for the periscope. (a) False (b) True
38. 38.🔭 Which of these reflects light well? (a) dark soil (b) still clear water (c) a rough wooden board (d) a dull brick
39. 39.🧺 Do we need a magnet for the periscope? (a) needed (b) not needed
40. 40.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: how clear the view is is kept the same. (a) True (b) False

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