Bright Because It Is Close is a free printable Grade 5 science worksheet on arguing that the sun's brightness is due to its distance from Earth, aligned to NGSS performance expectation 5-ESS1-1. It prints 8 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.
2.Two flashlights of equal brightness are set at 2 m and 20 m. What do you see?
A.The nearer one looks much brighter
B.They look the same
C.The far one looks brighter
3.Why is the sun's apparent brightness poor evidence that it is a large star?
A.The sun is not a star
B.Its closeness explains the brightness without any claim about size
C.Brightness never relates to size
4.The sun looks far brighter than any other star. What is the best explanation?
A.It is the only real star
B.It is very much closer to Earth than the other stars
C.It is the biggest star there is
5.What does that flashlight model show about stars?
A.Stars are flashlights
B.Distance changes how bright a light looks
C.Flashlights are stars
6.Which measurement would settle whether a dim star is small or distant?
A.Its distance from Earth
B.How long you look at it
C.Its color only
7.A star is moved twice as far away in a model. What happens to how bright it looks?
A.It looks brighter
B.It looks dimmer
C.Nothing changes
8.A star looks dim. What are the two possible reasons?
A.It is always small
B.It is far away, or it gives out less light, or both
C.It is going out
LessonPrint · 5-ESS1-1 · Set 1 · free to copy for classroom use
Answer key — Bright Because It Is Close
Set 1. Prints on its own sheet.
1.How bright a star looks from Earth
2.The nearer one looks much brighter
3.Its closeness explains the brightness without any claim about size
4.It is very much closer to Earth than the other stars
5.Distance changes how bright a light looks
6.Its distance from Earth
7.It looks dimmer
8.It is far away, or it gives out less light, or both
Questions about Bright Because It Is Close
What does the Bright Because It Is Close worksheet cover?
It practices arguing that the sun's brightness is due to its distance from Earth — 8 questions for Grade 5, all on NGSS 5-ESS1-1: Argue that stars look dimmer than the sun because they are much further away. The instruction to students is “Circle the best answer”, and the answer key follows on the next sheet.
Which NGSS performance expectation does Bright Because It Is Close practice?
5-ESS1-1, under Earth and Space Science for Grade 5. The published performance expectation reads: “Support an argument that differences in the apparent brightness of the sun compared to other stars is due to their relative distances from Earth.” The worksheet assesses that performance expectation rather than a paraphrase of it.
What age or grade is this worksheet for?
Bright Because It Is Close is written for Grade 5, typically ages 10-11. It is one of the sheets on 5-ESS1-1, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.
Does Bright Because It Is Close come with an answer key?
Yes. All 8 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 Bright Because It Is Close 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 Bright Because It Is Close free to print and photocopy?
Yes. Bright Because It Is Close, 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.
Is there a lesson plan to teach 5-ESS1-1?
Yes — “Bright Because It Is Close” is a 60-minute Grade 5 plan for 5-ESS1-1, timed section by section, with the misconceptions to expect and an exit ticket. Bright Because It Is Close is the practice that follows it.
More practice for 5-ESS1-1
Argue that stars look dimmer than the sun because they are much further away.
Teaching this next? Bright Because It Is Close is the 60-minute plan for it, with the misconceptions to expect.