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Around the Corner With Two Mirrors is a free printable Grade 4 science worksheet on using a mirror test to model how reflected light reaches the eye, aligned to NGSS performance expectation 4-PS4-2. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Around the Corner With Two Mirrors

4-PS4-2

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Around the Corner With Two Mirrors

What the class saw when a flashlight beam was aimed into a tube with two angled mirrors. THE PERISCOPE TUBE Flashlight on, both mirrors in place: the card at the far end was lit Flashlight on, top mirror removed: the card was not lit Flashlight off, both mirrors in place: nothing could be seen A hand held in the beam: the card went dark The card never moved.

  1. 1. What happened when a hand was held in the beam?
  2. 2. What did the card need before it could be seen?
  3. 3. What does this record not tell you?
  4. 4. What happened when the top mirror was removed?
2.A cyclist's reflector shines in a car's headlights. Why?
  • A.It reflects the headlight beam back toward the driver
  • B.It has its own battery
  • C.It is hot
3.Why does a periscope have its mirrors tilted?
  • A.So light from above is turned down the tube and then into the eye
  • B.So the mirrors do not fall out
  • C.So it looks interesting
4.Why can you not see around a corner without a mirror?
  • A.Light travels in straight lines and does not turn the corner by itself
  • B.Corners are too dark
  • C.Your eyes cannot move
5.A still pond shows a clear reflection, but a rippled one does not. Why?
  • A.Smooth water reflects light evenly, and ripples send it off in many directions
  • B.Still water is a mirror made of glass
  • C.Ripples make the water darker
6.A book makes no light of its own. Why can you see it?
  • A.Your eyes send light to it
  • B.Light from a lamp reflects off it into your eyes
  • C.Books glow faintly
7.In a dark room with no light at all, you cannot see a white cup. Why?
  • A.White cups are invisible
  • B.The cup is too far away
  • C.No light is reflecting off it into your eyes

LessonPrint · 4-PS4-2 · Set 6 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 6. Prints on its own sheet.

  1. 1.1. The card went dark. 2. Light reaching it along the path through both mirrors. 3. It does not tell you how bright the card was each time. 4. The card was not lit.
  2. 2.It reflects the headlight beam back toward the driver
  3. 3.So light from above is turned down the tube and then into the eye
  4. 4.Light travels in straight lines and does not turn the corner by itself
  5. 5.Smooth water reflects light evenly, and ripples send it off in many directions
  6. 6.Light from a lamp reflects off it into your eyes
  7. 7.No light is reflecting off it into your eyes

Last reviewed 2026-09-05. Aligned to 4-PS4-2 of the Next Generation Science Standards.