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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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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. Why could nothing be seen with the flashlight off?
  2. 2. What would happen with a third mirror added at an angle?
  3. 3. What happened when the top mirror was removed?
  4. 4. What happened when a hand was held in the beam?
2.What does a mirror do to light that hits it?
  • A.It soaks it up
  • B.It reflects it off in a new direction
  • C.It makes more light
3.A book makes no light of its own. Why can you see it?
  • A.Light from a lamp reflects off it into your eyes
  • B.Your eyes send light to it
  • C.Books glow faintly
4.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
5.Why can you not see around a corner without a mirror?
  • A.Corners are too dark
  • B.Your eyes cannot move
  • C.Light travels in straight lines and does not turn the corner by itself
6.Why does a periscope have its mirrors tilted?
  • A.So the mirrors do not fall out
  • B.So light from above is turned down the tube and then into the eye
  • C.So it looks interesting
7.What must happen for you to see the moon at night?
  • A.The moon must make its own light
  • B.Sunlight must reflect off the moon and reach your eyes
  • C.Your eyes must shine on it

LessonPrint · 4-PS4-2 · Set 10 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 10. Prints on its own sheet.

  1. 1.1. No light traveled to the card and back to the eye. 2. The light path would turn again before reaching the card. 3. The card was not lit. 4. The card went dark.
  2. 2.It reflects it off in a new direction
  3. 3.Light from a lamp reflects off it into your eyes
  4. 4.Smooth water reflects light evenly, and ripples send it off in many directions
  5. 5.Light travels in straight lines and does not turn the corner by itself
  6. 6.So light from above is turned down the tube and then into the eye
  7. 7.Sunlight must reflect off the moon and reach your eyes

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