Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 821 · 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) loose glass panes (b) plastic safety mirrors (c) big wall mirrors (d) broken glass bits
2. 2.🛟 Who should cut the holes in the juice carton? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
3. 3.🧺 Do we need vinegar for the periscope? (a) not needed (b) needed
4. 4.⚖️ 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 measure it (b) we keep it the same (c) we change it
5. 5.⚖️ 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 carton
6. 6.True or false: a pencil is not needed for the periscope. (a) True (b) False
7. 7.🛟 You must never point a periscope or a mirror at ___. (a) a wall (b) a friend’s toy (c) the Sun (d) a tree
8. 8.⚖️ 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 same mirrors (c) the angle of the mirrors (d) how clear the view is
9. 9.🧺 Which of these is needed for the periscope? (a) a magnet (b) two small mirrors (c) a battery cell (d) a balloon
10. 10.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the angle of the mirrors is what we measure. (a) True (b) False
11. 11.🧺 Do we need yeast for the periscope? (a) not needed (b) needed
12. 12.🧺 Which of these is needed for the periscope? (a) a pencil (b) yeast (c) a magnet (d) a balloon
13. 13.⚖️ 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
14. 14.True or false: a magnet is not needed for the periscope. (a) True (b) False
15. 15.🧺 Do we need sticky tape for the periscope? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) an empty juice carton (c) sticky tape (d) a battery cell
17. 17.🔭 How many mirrors does a simple periscope use?
18. 18.🔍 Which is the odd one out? (a) a mirror (b) dark soil (c) a dull brick (d) black cloth
19. 19.🔭 How many times does light bounce off a mirror in a simple periscope?
20. 20.🔭 Which of these reflects light well? (a) dark soil (b) still clear water (c) a dull brick (d) a rough wooden board
21. 21.🧺 Which of these is not needed for the periscope? (a) a ruler (b) a pencil (c) turmeric powder (d) sticky tape
22. 22.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) flipped left to right (b) upside down only (c) in colour (d) much bigger
23. 23.⚖️ 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
24. 24.🔭 At what angle are the mirrors set in a simple periscope? (a) 45 degrees (b) 180 degrees (c) 90 degrees (d) 10 degrees
25. 25.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) two small mirrors (c) a ruler (d) yeast
27. 27.🔭 Does a mirror reflect light well or poorly? (a) reflects light poorly (b) reflects light well
28. 28.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) turmeric powder (b) a ruler (c) sticky tape (d) a pencil
29. 29.🧺 Do we need a magnet for the periscope? (a) needed (b) not needed
30. 30.⚖️ 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
31. 31.🔭 Which of these reflects light poorly? (a) a mirror (b) aluminium foil (c) dark soil (d) still clear water
32. 32.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) a balloon (c) a pencil (d) an empty juice carton
33. 33.🔭 Which of these reflects light well? (a) a rough wooden board (b) dark soil (c) a shiny steel plate (d) a dull brick
34. 34.True or false: a dull brick reflects light well. (a) True (b) False
35. 35.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) sticky tape (c) two small mirrors (d) a magnet
36. 36.True or false: a mirror reflects light poorly. (a) False (b) True
37. 37.True or false: a shiny steel plate reflects light poorly. (a) False (b) True
38. 38.🧺 Do we need a balloon for the periscope? (a) not needed (b) needed
39. 39.True or false: a rough wooden board reflects light poorly. (a) False (b) True
40. 40.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a magnet (c) sticky tape (d) two small mirrors

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