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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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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 a hand was held in the beam?
  2. 2. Why could nothing be seen with the flashlight off?
  3. 3. What would happen with a third mirror added at an angle?
  4. 4. What claim does this record support?
2.A cyclist's reflector shines in a car's headlights. Why?
  • A.It reflects the headlight beam back toward the driver
  • B.It has its own battery
  • C.It is hot
3.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
4.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
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.Your eyes cannot move
  • C.Corners are too dark
6.Which surface reflects light most like a mirror?
  • A.A woolly sweater
  • B.Smooth shiny metal
  • C.Rough tree bark
7.What must happen for you to see the moon at night?
  • A.Your eyes must shine on it
  • B.The moon must make its own light
  • C.Sunlight must reflect off the moon and reach your eyes

LessonPrint · 4-PS4-2 · Set 7 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 7. Prints on its own sheet.

  1. 1.1. The card went dark. 2. No light traveled to the card and back to the eye. 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.It reflects the headlight beam back toward the driver
  3. 3.No light is reflecting off it into your eyes
  4. 4.So light from above is turned down the tube and then into the eye
  5. 5.Light travels in straight lines and does not turn the corner by itself
  6. 6.Smooth shiny metal
  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.