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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 18 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 would happen with a third mirror added at an angle?
  2. 2. What happened when the top mirror was removed?
  3. 3. What does this record not tell you?
  4. 4. What claim does this record support?
2.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
3.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
4.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
5.What does a mirror do to light that hits it?
  • A.It reflects it off in a new direction
  • B.It soaks it up
  • C.It makes more light
6.A still pond shows a clear reflection, but a rippled one does not. Why?
  • A.Ripples make the water darker
  • B.Smooth water reflects light evenly, and ripples send it off in many directions
  • C.Still water is a mirror made of glass
7.A cyclist's reflector shines in a car's headlights. Why?
  • A.It is hot
  • B.It has its own battery
  • C.It reflects the headlight beam back toward the driver

LessonPrint · 4-PS4-2 · Set 18 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 18. Prints on its own sheet.

  1. 1.1. The light path would turn again before reaching the card. 2. The card was not lit. 3. It does not tell you how bright the card was each time. 4. Light travels a path, reflects off mirrors, and must enter the eye for something to be seen.
  2. 2.So light from above is turned down the tube and then into the eye
  3. 3.Light travels in straight lines and the hand blocks it
  4. 4.No light is reflecting off it into your eyes
  5. 5.It reflects it off in a new direction
  6. 6.Smooth water reflects light evenly, and ripples send it off in many directions
  7. 7.It reflects the headlight beam back toward the driver

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