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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 13 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. Why could nothing be seen with the flashlight off?
  2. 2. What did the card need before it could be seen?
  3. 3. What would happen with a third mirror added at an angle?
  4. 4. What claim does this record support?
2.Why does a periscope have its mirrors tilted?
  • A.So it looks interesting
  • B.So light from above is turned down the tube and then into the eye
  • C.So the mirrors do not fall out
3.What does a mirror do to light that hits it?
  • A.It reflects it off in a new direction
  • B.It makes more light
  • C.It soaks it up
4.A cyclist's reflector shines in a car's headlights. Why?
  • A.It has its own battery
  • B.It reflects the headlight beam back toward the driver
  • C.It is hot
5.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
6.Which surface reflects light most like a mirror?
  • A.Rough tree bark
  • B.A woolly sweater
  • C.Smooth shiny metal
7.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

LessonPrint · 4-PS4-2 · Set 13 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 13. Prints on its own sheet.

  1. 1.1. No light traveled to the card and back to the eye. 2. Light reaching it along the path through both mirrors. 3. The light path would turn again before reaching the card. 4. Light travels a path, reflects off mirrors, and must enter the eye for something to be seen.
  2. 2.So light from above is turned down the tube and then into the eye
  3. 3.It reflects it off in a new direction
  4. 4.It reflects the headlight beam back toward the driver
  5. 5.Light travels in straight lines and does not turn the corner by itself
  6. 6.Smooth shiny metal
  7. 7.Smooth water reflects light evenly, and ripples send it off in many directions

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