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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 4 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 does this record not tell you?
  2. 2. What happened when a hand was held in the beam?
  3. 3. Why could nothing be seen with the flashlight off?
  4. 4. What claim does this record support?
2.A hand held in a flashlight beam makes a dark patch behind it. What does that show?
  • A.The hand soaks up all the air
  • B.Light travels in straight lines and the hand blocks it
  • C.The flashlight turned off
3.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
4.What must happen for you to see the moon at night?
  • A.Sunlight must reflect off the moon and reach your eyes
  • B.Your eyes must shine on it
  • C.The moon must make its own light
5.A book makes no light of its own. Why can you see it?
  • A.Light from a lamp reflects off it into your eyes
  • B.Your eyes send light to it
  • C.Books glow faintly
6.What does a mirror do to light that hits it?
  • A.It reflects it off in a new direction
  • B.It makes more light
  • C.It soaks it up
7.A still pond shows a clear reflection, but a rippled one does not. Why?
  • A.Ripples make the water darker
  • B.Still water is a mirror made of glass
  • C.Smooth water reflects light evenly, and ripples send it off in many directions

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

Answer key — Around the Corner With Two Mirrors

Set 4. Prints on its own sheet.

  1. 1.1. It does not tell you how bright the card was each time. 2. The card went dark. 3. No light traveled to the card and back to the eye. 4. Light travels a path, reflects off mirrors, and must enter the eye for something to be seen.
  2. 2.Light travels in straight lines and the hand blocks it
  3. 3.It reflects the headlight beam back toward the driver
  4. 4.Sunlight must reflect off the moon and reach your eyes
  5. 5.Light from a lamp reflects off it into your eyes
  6. 6.It reflects it off in a new direction
  7. 7.Smooth water reflects light evenly, and ripples send it off in many directions

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