Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 8 · 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.🔭 How many times does light bounce off a mirror in a simple periscope?
2. 2.🧺 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
3. 3.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the same light is the one thing we change. (a) True (b) False
4. 4.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) two small mirrors (c) a pencil (d) turmeric powder
5. 5.🔍 Which is the odd one out? (a) a mirror (b) a rough wooden board (c) aluminium foil (d) still clear water
6. 6.True or false: a balloon is needed for the periscope. (a) True (b) False
7. 7.🧺 Do we need a ruler for the periscope? (a) not needed (b) needed
8. 8.🧺 Do we need a magnet for the periscope? (a) not needed (b) needed
9. 9.🛟 Which mirrors are safest for a children’s periscope? (a) plastic safety mirrors (b) broken glass bits (c) loose glass panes (d) big wall mirrors
10. 10.🛟 Who should cut the holes in the juice carton? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
11. 11.🔍 Which is the odd one out? (a) dark soil (b) a rough wooden board (c) a dull brick (d) a mirror
12. 12.⚖️ 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) True (b) False
13. 13.📘 Light bouncing off a mirror is called ___. (a) refraction (b) reflection (c) magnetism (d) evaporation
14. 14.🔭 Which of these reflects light poorly? (a) dark soil (b) a mirror (c) still clear water (d) a shiny steel plate
15. 15.🧺 Do we need vinegar for the periscope? (a) needed (b) not needed
16. 16.True or false: a mirror reflects light well. (a) True (b) False
17. 17.🧺 Do we need an empty juice carton for the periscope? (a) needed (b) not needed
18. 18.🔍 Which is the odd one out? (a) dark soil (b) aluminium foil (c) a rough wooden board (d) black cloth
19. 19.🧺 Which of these is not needed for the periscope? (a) an empty juice carton (b) a pencil (c) a ruler (d) vinegar
20. 20.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a brighter view (b) two pictures (c) a rainbow (d) only darkness
21. 21.🔭 Which of these reflects light well? (a) a rough wooden board (b) a dull brick (c) dark soil (d) a mirror
22. 22.🔍 Which is the odd one out? (a) a rough wooden board (b) a shiny steel plate (c) black cloth (d) dark soil
23. 23.🔭 Why must the two mirrors face each other and be parallel? (a) to make it heavy (b) so it looks shiny (c) so it can float (d) so light reaches the eye
24. 24.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) in colour (b) much bigger (c) upside down only (d) flipped left to right
25. 25.🧺 Which of these is needed for the periscope? (a) yeast (b) vinegar (c) a balloon (d) an empty juice carton
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) vinegar (b) two small mirrors (c) an empty juice carton (d) a pencil
28. 28.⚖️ 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) True (b) False
29. 29.True or false: black cloth reflects light well. (a) True (b) False
30. 30.🔭 Does a rough wooden board reflect light well or poorly? (a) reflects light well (b) reflects light poorly
31. 31.🔭 How many mirrors does a simple periscope use?
32. 32.🔍 Which is the odd one out? (a) a shiny steel plate (b) still clear water (c) black cloth (d) a mirror
33. 33.True or false: a magnet is not needed for the periscope. (a) False (b) True
34. 34.True or false: a magnet is needed for the periscope. (a) True (b) False
35. 35.🔭 Does a dull brick reflect light well or poorly? (a) reflects light poorly (b) reflects light well
36. 36.🔭 Which of these reflects light poorly? (a) a shiny steel plate (b) a dull brick (c) still clear water (d) a mirror
37. 37.🧺 Which of these is not needed for the periscope? (a) a magnet (b) an empty juice carton (c) two small mirrors (d) a ruler
38. 38.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) how clear the view is (b) the same carton (c) the same light (d) the angle of the mirrors
39. 39.True or false: a mirror reflects light poorly. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) black cloth (b) still clear water (c) a dull brick (d) a rough wooden board

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