Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 185 · 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 balloon is not needed for the periscope. (a) True (b) False
2. 2.🛟 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
3. 3.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) sticky tape (c) a ruler (d) a magnet
4. 4.🔭 Does still clear water reflect light well or poorly? (a) reflects light well (b) reflects light poorly
5. 5.⚖️ 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
6. 6.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a rainbow (b) two pictures (c) a brighter view (d) only darkness
7. 7.🔍 Which is the odd one out? (a) a rough wooden board (b) dark soil (c) a dull brick (d) a shiny steel plate
8. 8.🧺 Which of these is not needed for the periscope? (a) sticky tape (b) a pencil (c) a balloon (d) two small mirrors
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 keep it the same (b) we change it (c) we measure it
10. 10.🧺 Do we need a ruler for the periscope? (a) needed (b) not needed
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the angle of the mirrors (b) the same light (c) the same carton (d) how clear the view is
13. 13.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) an empty juice carton (c) a ruler (d) yeast
14. 14.🧺 Do we need a balloon for the periscope? (a) needed (b) not needed
15. 15.🔍 Which is the odd one out? (a) aluminium foil (b) a rough wooden board (c) a dull brick (d) black cloth
16. 16.True or false: a battery cell is needed for the periscope. (a) False (b) True
17. 17.⚖️ 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
18. 18.True or false: a shiny steel plate reflects light poorly. (a) False (b) True
19. 19.🔭 How many mirrors does a simple periscope use?
20. 20.⚖️ 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) False (b) True
21. 21.🔭 Which of these reflects light poorly? (a) a mirror (b) aluminium foil (c) black cloth (d) still clear water
22. 22.True or false: still clear water reflects light well. (a) False (b) True
23. 23.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) sticky tape (c) two small mirrors (d) turmeric powder
24. 24.🧺 Which of these is needed for the periscope? (a) yeast (b) a battery cell (c) a magnet (d) an empty juice carton
25. 25.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a ruler (b) vinegar (c) two small mirrors (d) sticky tape
26. 26.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) flipped left to right (b) upside down only (c) much bigger (d) in colour
27. 27.🔭 Which of these reflects light well? (a) dark soil (b) black cloth (c) a dull brick (d) a mirror
28. 28.🧺 Which of these is not needed for the periscope? (a) a ruler (b) vinegar (c) two small mirrors (d) an empty juice carton
29. 29.🧺 Which of these is needed for the periscope? (a) a battery cell (b) yeast (c) two small mirrors (d) a magnet
30. 30.🧺 Do we need vinegar for the periscope? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.🔭 Does a rough wooden board reflect light well or poorly? (a) reflects light well (b) reflects light poorly
33. 33.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) so it can float (c) so light reaches the eye (d) to make it heavy
34. 34.📘 Light bouncing off a mirror is called ___. (a) refraction (b) reflection (c) evaporation (d) magnetism
35. 35.🔭 Who uses a periscope to look above the water? (a) a farmer (b) a pilot in a plane (c) a baker (d) a submarine crew
36. 36.🔍 Which is the odd one out? (a) a dull brick (b) still clear water (c) a mirror (d) aluminium foil
37. 37.🛟 Who should cut the holes in the juice carton? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
38. 38.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) nothing at all (b) only short walls (c) taller walls (d) the ground
39. 39.🔭 Which of these reflects light well? (a) a rough wooden board (b) dark soil (c) aluminium foil (d) a dull brick
40. 40.🛟 You must never point a periscope or a mirror at ___. (a) a tree (b) the Sun (c) a friend’s toy (d) a wall

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