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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 21 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 claim does this record support?
  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.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
3.A book makes no light of its own. Why can you see it?
  • A.Your eyes send light to it
  • B.Light from a lamp reflects off it into your eyes
  • C.Books glow faintly
4.A cyclist's reflector shines in a car's headlights. Why?
  • A.It has its own battery
  • B.It is hot
  • C.It reflects the headlight beam back toward the driver
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 hand held in a flashlight beam makes a dark patch behind it. What does that show?
  • A.The flashlight turned off
  • B.Light travels in straight lines and the hand blocks it
  • C.The hand soaks up all the air

LessonPrint · 4-PS4-2 · Set 21 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 21. Prints on its own sheet.

  1. 1.1. No light traveled to the card and back to the eye. 2. Light travels a path, reflects off mirrors, and must enter the eye for something to be seen. 3. The light path would turn again before reaching the card. 4. The card went dark.
  2. 2.No light is reflecting off it into your eyes
  3. 3.Light from a lamp reflects off it into your eyes
  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.Light travels in straight lines and the hand blocks it

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