Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 697 · 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.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) two small mirrors (c) an empty juice carton (d) vinegar
2. 2.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
3. 3.🔭 Why must the two mirrors face each other and be parallel? (a) so light reaches the eye (b) so it can float (c) to make it heavy (d) so it looks shiny
4. 4.🧺 Which of these is needed for the periscope? (a) a ruler (b) a balloon (c) yeast (d) a battery cell
5. 5.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) yeast (b) sticky tape (c) a pencil (d) an empty juice carton
6. 6.True or false: a rough wooden board reflects light poorly. (a) False (b) True
7. 7.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) upside down only (b) in colour (c) flipped left to right (d) much bigger
8. 8.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) a magnet (c) sticky tape (d) a ruler
9. 9.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🔭 Which of these reflects light well? (a) black cloth (b) dark soil (c) a shiny steel plate (d) a dull brick
11. 11.🔭 Which of these reflects light well? (a) a mirror (b) dark soil (c) a dull brick (d) a rough wooden board
12. 12.🔭 Does dark soil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
13. 13.True or false: aluminium foil reflects light well. (a) False (b) True
14. 14.🧺 Which of these is not needed for the periscope? (a) turmeric powder (b) two small mirrors (c) an empty juice carton (d) a pencil
15. 15.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same light is what we measure. (a) True (b) False
16. 16.🧺 Do we need a magnet for the periscope? (a) not needed (b) needed
17. 17.🧺 Do we need a balloon for the periscope? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a pencil (c) two small mirrors (d) a balloon
19. 19.True or false: turmeric powder is needed for the periscope. (a) True (b) False
20. 20.🔭 Which of these reflects light poorly? (a) dark soil (b) still clear water (c) aluminium foil (d) a shiny steel plate
21. 21.🧺 Do we need two small mirrors for the periscope? (a) not needed (b) needed
22. 22.🧺 Do we need yeast for the periscope? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the periscope? (a) a ruler (b) a pencil (c) two small mirrors (d) a battery cell
24. 24.True or false: an empty juice carton is needed for the periscope. (a) True (b) False
25. 25.⚖️ 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
26. 26.🔭 Which of these reflects light well? (a) still clear water (b) a dull brick (c) black cloth (d) a rough wooden board
27. 27.🔭 How many times does light bounce off a mirror in a simple periscope?
28. 28.🧺 Do we need an empty juice carton for the periscope? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the periscope? (a) a balloon (b) turmeric powder (c) an empty juice carton (d) yeast
30. 30.🔍 Which is the odd one out? (a) black cloth (b) a rough wooden board (c) aluminium foil (d) dark soil
31. 31.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the object we look at is the one thing we change. (a) False (b) True
32. 32.True or false: aluminium foil reflects light poorly. (a) False (b) True
33. 33.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the object we look at”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.True or false: still clear water reflects light poorly. (a) True (b) False
35. 35.🛟 Which mirrors are safest for a children’s periscope? (a) broken glass bits (b) big wall mirrors (c) loose glass panes (d) plastic safety mirrors
36. 36.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light well (b) reflects light poorly
37. 37.True or false: an empty juice carton is not needed for the periscope. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a mirror (b) a shiny steel plate (c) still clear water (d) black cloth
39. 39.🔍 Which is the odd one out? (a) a rough wooden board (b) aluminium foil (c) still clear water (d) a shiny steel plate
40. 40.🛟 You must never point a periscope or a mirror at ___. (a) the Sun (b) a wall (c) a friend’s toy (d) a tree

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