Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 981 · 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.True or false: a ruler is needed for the periscope. (a) False (b) True
2. 2.True or false: an empty juice carton is needed for the periscope. (a) True (b) False
3. 3.🛟 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
4. 4.🔭 Does a dull brick reflect light well or poorly? (a) reflects light well (b) reflects light poorly
5. 5.🔭 Does a shiny steel plate reflect light well or poorly? (a) reflects light well (b) reflects light poorly
6. 6.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: how clear the view is is what we measure. (a) True (b) False
7. 7.⚖️ 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 measure it (c) we change it
8. 8.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) an empty juice carton (c) a pencil (d) a battery cell
9. 9.🔍 Which is the odd one out? (a) a mirror (b) black cloth (c) a shiny steel plate (d) aluminium foil
10. 10.📘 Light bouncing off a mirror is called ___. (a) magnetism (b) evaporation (c) reflection (d) refraction
11. 11.🔭 How many times does light bounce off a mirror in a simple periscope?
12. 12.🔍 Which is the odd one out? (a) a dull brick (b) black cloth (c) a rough wooden board (d) a mirror
13. 13.🧺 Do we need a pencil for the periscope? (a) not needed (b) needed
14. 14.🛟 You must never point a periscope or a mirror at ___. (a) a wall (b) the Sun (c) a friend’s toy (d) a tree
15. 15.True or false: still clear water reflects light well. (a) True (b) False
16. 16.🔭 Does aluminium foil reflect light well or poorly? (a) reflects light well (b) reflects light poorly
17. 17.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) nothing at all (b) taller walls (c) the ground (d) only short walls
18. 18.🛟 Who should cut the holes in the juice carton? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
19. 19.🧺 Which of these is not needed for the periscope? (a) a ruler (b) an empty juice carton (c) yeast (d) two small mirrors
20. 20.True or false: aluminium foil reflects light well. (a) False (b) True
21. 21.🔭 Which of these reflects light well? (a) dark soil (b) a dull brick (c) black cloth (d) a mirror
22. 22.🧺 Which of these is needed for the periscope? (a) a balloon (b) two small mirrors (c) yeast (d) vinegar
23. 23.🔭 How many mirrors does a simple periscope use?
24. 24.⚖️ 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
25. 25.⚖️ 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 light (b) the angle of the mirrors (c) the same mirrors (d) the same carton
26. 26.🔭 Which of these reflects light poorly? (a) aluminium foil (b) a rough wooden board (c) still clear water (d) a mirror
27. 27.🧺 Do we need a battery cell for the periscope? (a) not needed (b) needed
28. 28.🔍 Which is the odd one out? (a) a dull brick (b) black cloth (c) dark soil (d) still clear water
29. 29.True or false: a shiny steel plate reflects light poorly. (a) False (b) True
30. 30.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) a balloon (c) sticky tape (d) a ruler
31. 31.True or false: a shiny steel plate reflects light well. (a) True (b) False
32. 32.🧺 Do we need turmeric powder for the periscope? (a) needed (b) not needed
33. 33.True or false: a ruler is not needed for the periscope. (a) True (b) False
34. 34.True or false: a battery cell is not needed for the periscope. (a) False (b) True
35. 35.⚖️ 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
36. 36.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the angle of the mirrors is the one thing we change. (a) True (b) False
37. 37.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) a magnet (c) two small mirrors (d) a pencil
38. 38.🧺 Do we need a magnet for the periscope? (a) not needed (b) needed
39. 39.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) to make it heavy (c) so it can float (d) so light reaches the eye
40. 40.🔭 At what angle are the mirrors set in a simple periscope? (a) 180 degrees (b) 10 degrees (c) 90 degrees (d) 45 degrees

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