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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 9 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 did the card need before it could be seen?
  4. 4. What would happen with a third mirror added at an angle?
2.A cyclist's reflector shines in a car's headlights. Why?
  • A.It reflects the headlight beam back toward the driver
  • B.It is hot
  • C.It has its own battery
3.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
4.A book makes no light of its own. Why can you see it?
  • A.Books glow faintly
  • B.Light from a lamp reflects off it into your eyes
  • C.Your eyes send light to it
5.In a dark room with no light at all, you cannot see a white cup. Why?
  • A.The cup is too far away
  • B.White cups are invisible
  • C.No light is reflecting off it into your eyes
6.What must happen for you to see the moon at night?
  • A.Sunlight must reflect off the moon and reach your eyes
  • B.The moon must make its own light
  • C.Your eyes must shine on it
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 9 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 9. 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. Light reaching it along the path through both mirrors. 4. The light path would turn again before reaching the card.
  2. 2.It reflects the headlight beam back toward the driver
  3. 3.Light travels in straight lines and does not turn the corner by itself
  4. 4.Light from a lamp reflects off it into your eyes
  5. 5.No light is reflecting off it into your eyes
  6. 6.Sunlight must reflect off the moon and reach your eyes
  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.