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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 19 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 claim does this record support?
  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 makes more light
  • B.It reflects it off in a new direction
  • C.It soaks it up
3.What must happen for you to see the moon at night?
  • A.Your eyes must shine on it
  • B.Sunlight must reflect off the moon and reach your eyes
  • C.The moon must make its own light
4.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
5.A cyclist's reflector shines in a car's headlights. Why?
  • A.It is hot
  • B.It has its own battery
  • C.It reflects the headlight beam back toward the driver
6.Why can you not see around a corner without a mirror?
  • A.Your eyes cannot move
  • B.Light travels in straight lines and does not turn the corner by itself
  • C.Corners are too dark
7.In a dark room with no light at all, you cannot see a white cup. Why?
  • A.White cups are invisible
  • B.No light is reflecting off it into your eyes
  • C.The cup is too far away

LessonPrint · 4-PS4-2 · Set 19 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 19. 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. Light travels a path, reflects off mirrors, and must enter the eye for something to be seen. 4. The card went dark.
  2. 2.It reflects it off in a new direction
  3. 3.Sunlight must reflect off the moon and reach your eyes
  4. 4.Smooth water reflects light evenly, and ripples send it off in many directions
  5. 5.It reflects the headlight beam back toward the driver
  6. 6.Light travels in straight lines and does not turn the corner by itself
  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.