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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.

Set 2 of 25 · the same problems every time you open this link.

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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 the top mirror was removed?
  2. 2. What would happen with a third mirror added at an angle?
  3. 3. What claim does this record support?
  4. 4. What happened when a hand was held in the beam?
2.A still pond shows a clear reflection, but a rippled one does not. Why?
  • A.Ripples make the water darker
  • B.Smooth water reflects light evenly, and ripples send it off in many directions
  • C.Still water is a mirror made of glass
3.Which surface reflects light most like a mirror?
  • A.Rough tree bark
  • B.A woolly sweater
  • C.Smooth shiny metal
4.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
5.A book makes no light of its own. Why can you see it?
  • A.Your eyes send light to it
  • B.Books glow faintly
  • C.Light from a lamp reflects off it into your eyes
6.What must happen for you to see the moon at night?
  • A.Sunlight must reflect off the moon and reach your eyes
  • B.Your eyes must shine on it
  • C.The moon must make its own light
7.What does a mirror do to light that hits it?
  • A.It makes more light
  • B.It reflects it off in a new direction
  • C.It soaks it up

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

Answer key — Around the Corner With Two Mirrors

Set 2. Prints on its own sheet.

  1. 1.1. The card was not lit. 2. The light path would turn again before reaching the card. 3. Light travels a path, reflects off mirrors, and must enter the eye for something to be seen. 4. The card went dark.
  2. 2.Smooth water reflects light evenly, and ripples send it off in many directions
  3. 3.Smooth shiny metal
  4. 4.Light travels in straight lines and does not turn the corner by itself
  5. 5.Light from a lamp reflects off it into your eyes
  6. 6.Sunlight must reflect off the moon and reach your eyes
  7. 7.It reflects it off in a new direction

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