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 1 of 25 · the same problems every time you open this link.
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. What does this record not tell you?
2. Why could nothing be seen with the flashlight off?
3. What did the card need before it could be seen?
4. What happened when a hand was held in the beam?
2.A cyclist's reflector shines in a car's headlights. Why?
A.It reflects the headlight beam back toward the driver
B.It is hot
C.It has its own battery
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.Which surface reflects light most like a mirror?
A.Rough tree bark
B.A woolly sweater
C.Smooth shiny metal
5.What does a mirror do to light that hits it?
A.It soaks it up
B.It makes more light
C.It reflects it off in a new direction
6.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
7.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
LessonPrint · 4-PS4-2 · Set 1 · free to copy for classroom use
Answer key — Around the Corner With Two Mirrors
Set 1. Prints on its own sheet.
1.1. It does not tell you how bright the card was each time. 2. No light traveled to the card and back to the eye. 3. Light reaching it along the path through both mirrors. 4. The card went dark.
2.It reflects the headlight beam back toward the driver
3.So light from above is turned down the tube and then into the eye
4.Smooth shiny metal
5.It reflects it off in a new direction
6.Light from a lamp reflects off it into your eyes
7.Light travels in straight lines and the hand blocks it
Questions about Around the Corner With Two Mirrors
What does the Around the Corner With Two Mirrors worksheet cover?
It practices using a mirror test to model how reflected light reaches the eye — 7 questions for Grade 4, all on NGSS 4-PS4-2: Model how light bouncing off a thing and into your eye lets you see it. The instruction to students is “Read the record, then answer the questions”, and the answer key follows on the next sheet.
Which NGSS performance expectation does Around the Corner With Two Mirrors practice?
4-PS4-2, under Physical Science for Grade 4. The published performance expectation reads: “Develop a model to describe that light reflecting from objects and entering the eye allows objects to be seen.” The worksheet assesses that performance expectation rather than a paraphrase of it.
What age or grade is this worksheet for?
Around the Corner With Two Mirrors is written for Grade 4, typically ages 9-10. It is one of the sheets on 4-PS4-2, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.
Does Around the Corner With Two Mirrors come with an answer key?
Yes. All 7 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.
How many different versions of Around the Corner With Two Mirrors can I print?
25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.
Is Around the Corner With Two Mirrors free to print and photocopy?
Yes. Around the Corner With Two Mirrors, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.
More practice for 4-PS4-2
Model how light bouncing off a thing and into your eye lets you see it.