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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 23 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 happened when a hand was held in the beam?
  2. 2. What does this record not tell you?
  3. 3. What did the card need before it could be seen?
  4. 4. What happened when the top mirror was removed?
2.What must happen for you to see the moon at night?
  • A.The moon must make its own light
  • B.Your eyes must shine on it
  • C.Sunlight must reflect off the moon and reach your eyes
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 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
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.Books glow faintly
  • C.Your eyes send light to it
6.Why does a periscope have its mirrors tilted?
  • A.So the mirrors do not fall out
  • B.So it looks interesting
  • C.So light from above is turned down the tube and then into the eye
7.In a dark room with no light at all, you cannot see a white cup. Why?
  • A.No light is reflecting off it into your eyes
  • B.White cups are invisible
  • C.The cup is too far away

LessonPrint · 4-PS4-2 · Set 23 · free to copy for classroom use

Answer key — Around the Corner With Two Mirrors

Set 23. Prints on its own sheet.

  1. 1.1. The card went dark. 2. It does not tell you how bright the card was each time. 3. Light reaching it along the path through both mirrors. 4. The card was not lit.
  2. 2.Sunlight must reflect off the moon and reach your eyes
  3. 3.It reflects the headlight beam back toward the driver
  4. 4.It reflects it off in a new direction
  5. 5.Light from a lamp reflects off it into your eyes
  6. 6.So light from above is turned down the tube and then into the eye
  7. 7.No light is reflecting off it into your eyes

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