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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 11 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 did the card need before it could be seen?
  2. 2. What does this record not tell you?
  3. 3. Why could nothing be seen with the flashlight off?
  4. 4. What happened when a hand was held in the beam?
2.A still pond shows a clear reflection, but a rippled one does not. Why?
  • A.Smooth water reflects light evenly, and ripples send it off in many directions
  • B.Still water is a mirror made of glass
  • C.Ripples make the water darker
3.Why does a periscope have its mirrors tilted?
  • A.So the mirrors do not fall out
  • B.So light from above is turned down the tube and then into the eye
  • C.So it looks interesting
4.What does a mirror do to light that hits it?
  • A.It soaks it up
  • B.It reflects it off in a new direction
  • C.It makes more light
5.A book makes no light of its own. Why can you see it?
  • A.Your eyes send light to it
  • B.Books glow faintly
  • C.Light from a lamp reflects off it into your eyes
6.Which surface reflects light most like a mirror?
  • A.Rough tree bark
  • B.A woolly sweater
  • C.Smooth shiny metal
7.A cyclist's reflector shines in a car's headlights. Why?
  • A.It is hot
  • B.It reflects the headlight beam back toward the driver
  • C.It has its own battery

LessonPrint · 4-PS4-2 · Set 11 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 11. Prints on its own sheet.

  1. 1.1. Light reaching it along the path through both mirrors. 2. It does not tell you how bright the card was each time. 3. No light traveled to the card and back to the eye. 4. The card went dark.
  2. 2.Smooth water reflects light evenly, and ripples send it off in many directions
  3. 3.So light from above is turned down the tube and then into the eye
  4. 4.It reflects it off in a new direction
  5. 5.Light from a lamp reflects off it into your eyes
  6. 6.Smooth shiny metal
  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.