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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 would happen with a third mirror added at an angle?
  2. 2. What does this record not tell you?
  3. 3. What happened when a hand was held in the beam?
  4. 4. What happened when the top mirror was removed?
2.A cyclist's reflector shines in a car's headlights. Why?
  • A.It has its own battery
  • B.It reflects the headlight beam back toward the driver
  • C.It is hot
3.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
4.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
5.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
6.A hand held in a flashlight beam makes a dark patch behind it. What does that show?
  • A.Light travels in straight lines and the hand blocks it
  • B.The hand soaks up all the air
  • C.The flashlight turned off
7.Why does a periscope have its mirrors tilted?
  • A.So light from above is turned down the tube and then into the eye
  • B.So the mirrors do not fall out
  • C.So it looks interesting

LessonPrint · 4-PS4-2 · Set 5 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 5. Prints on its own sheet.

  1. 1.1. The light path would turn again before reaching the card. 2. It does not tell you how bright the card was each time. 3. The card went dark. 4. The card was not lit.
  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.It reflects it off in a new direction
  5. 5.Smooth water reflects light evenly, and ripples send it off in many directions
  6. 6.Light travels in straight lines and the hand blocks it
  7. 7.So light from above is turned down the tube and then into the eye

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