Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 145 · 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.⚖️ 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 change it (c) we keep it the same
2. 2.🛟 Which mirrors are safest for a children’s periscope? (a) loose glass panes (b) broken glass bits (c) plastic safety mirrors (d) big wall mirrors
3. 3.🧺 Do we need a balloon for the periscope? (a) not needed (b) needed
4. 4.🔭 How many times does light bounce off a mirror in a simple periscope?
5. 5.🧺 Do we need turmeric powder for the periscope? (a) not needed (b) needed
6. 6.🔍 Which is the odd one out? (a) aluminium foil (b) still clear water (c) a shiny steel plate (d) a rough wooden board
7. 7.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) the ground (b) only short walls (c) taller walls (d) nothing at all
8. 8.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a ruler (c) yeast (d) two small mirrors
9. 9.📘 Light bouncing off a mirror is called ___. (a) refraction (b) reflection (c) magnetism (d) evaporation
10. 10.🛟 You must never point a periscope or a mirror at ___. (a) a friend’s toy (b) a wall (c) the Sun (d) a tree
11. 11.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a battery cell (b) an empty juice carton (c) sticky tape (d) a ruler
12. 12.🔭 Does dark soil reflect light well or poorly? (a) reflects light poorly (b) reflects light well
13. 13.🔭 Which of these reflects light poorly? (a) a mirror (b) black cloth (c) a shiny steel plate (d) aluminium foil
14. 14.🧺 Which of these is not needed for the periscope? (a) two small mirrors (b) a pencil (c) a balloon (d) an empty juice carton
15. 15.🔭 How many mirrors does a simple periscope use?
16. 16.True or false: still clear water reflects light poorly. (a) False (b) True
17. 17.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “how clear the view is”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same light”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same carton is kept the same. (a) True (b) False
20. 20.True or false: sticky tape is needed for the periscope. (a) True (b) False
21. 21.🔭 Which of these reflects light poorly? (a) still clear water (b) a shiny steel plate (c) a rough wooden board (d) aluminium foil
22. 22.⚖️ 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) False (b) True
23. 23.🔍 Which is the odd one out? (a) still clear water (b) a shiny steel plate (c) dark soil (d) aluminium foil
24. 24.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a balloon (b) two small mirrors (c) a pencil (d) a ruler
25. 25.🧺 Do we need yeast for the periscope? (a) needed (b) not needed
26. 26.🧺 Do we need a pencil for the periscope? (a) not needed (b) needed
27. 27.True or false: two small mirrors is needed for the periscope. (a) True (b) False
28. 28.🧺 Do we need a battery cell for the periscope? (a) not needed (b) needed
29. 29.🛟 Who should cut the holes in the juice carton? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
30. 30.🔭 What does a periscope let you do? (a) see in the dark (b) see germs (c) see over a wall (d) hear far sounds
31. 31.🔭 Why must the two mirrors face each other and be parallel? (a) to make it heavy (b) so it can float (c) so light reaches the eye (d) so it looks shiny
32. 32.True or false: black cloth reflects light well. (a) False (b) True
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the periscope? (a) two small mirrors (b) a ruler (c) a pencil (d) yeast
35. 35.🔭 Which of these reflects light well? (a) still clear water (b) black cloth (c) a rough wooden board (d) dark soil
36. 36.True or false: vinegar is needed for the periscope. (a) True (b) False
37. 37.True or false: a ruler is needed for the periscope. (a) False (b) True
38. 38.🧺 Which of these is needed for the periscope? (a) a battery cell (b) turmeric powder (c) sticky tape (d) a balloon
39. 39.🔭 Who uses a periscope to look above the water? (a) a pilot in a plane (b) a baker (c) a submarine crew (d) a farmer
40. 40.True or false: a ruler is not needed for the periscope. (a) False (b) True

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