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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 12 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 claim does this record support?
  2. 2. What happened when the top mirror was removed?
  3. 3. What would happen with a third mirror added at an angle?
  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.A hand held in a flashlight beam makes a dark patch behind it. What does that show?
  • A.Light travels in straight lines and the hand blocks it
  • B.The flashlight turned off
  • C.The hand soaks up all the air
4.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
5.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
6.Why can you not see around a corner without a mirror?
  • A.Corners are too dark
  • B.Light travels in straight lines and does not turn the corner by itself
  • C.Your eyes cannot move
7.Which surface reflects light most like a mirror?
  • A.A woolly sweater
  • B.Rough tree bark
  • C.Smooth shiny metal

LessonPrint · 4-PS4-2 · Set 12 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 12. Prints on its own sheet.

  1. 1.1. Light travels a path, reflects off mirrors, and must enter the eye for something to be seen. 2. The card was not lit. 3. The light path would turn again before reaching the card. 4. The card went dark.
  2. 2.Smooth water reflects light evenly, and ripples send it off in many directions
  3. 3.Light travels in straight lines and the hand blocks it
  4. 4.It reflects it off in a new direction
  5. 5.No light is reflecting off it into your eyes
  6. 6.Light travels in straight lines and does not turn the corner by itself
  7. 7.Smooth shiny metal

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