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Grade 5scienceStudents interpret data showing that a star's apparent brightness is affected by distance from Earth.

Why Stars Look Brighter

Practice stars, brightness, and distance with 10 problems, an answer key, and a printable PDF for Grade 5.

10 problems · Standards: 5-ESS1-1 · Difficulty: hard

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✅ Answer key included · ✅ Free for home & classroom use

Highlights

Grade: Grade 5
Subject: science
Topic: Students interpret data showing that a star's apparent brightness is affected by distance from Earth.
Pages: 3 · worksheet + answer key
Answer key: ✅ Included
Class time: about 15 min

1. Two identical flashlights are turned on. Flashlight A is 2 meters away from you. Flashlight B is 10 meters away from you. Which flashlight appears brighter to you?
2. Star P and Star Q give off exactly the same amount of light energy. Star P is closer to Earth than Star Q. Which star appears brighter from Earth?
3. Look at this data: Star M is 50 light-years from Earth and appears very bright. Star N is 50 light-years from Earth and appears dim. Do these two stars produce the same amount of light energy?
4. Three identical lamps are placed at distances of 5 meters, 15 meters, and 25 meters from an observer. Which lamp appears the dimmest?
5. Star J produces 100 units of light and is 20 light-years away. Star K produces 100 units of light and is 80 light-years away. If Star K appears dim from Earth, how would you describe how Star J appears from Earth?
6. An astronomer observes that Star W appears twice as bright as Star V from Earth. Both stars are the same distance from Earth. Which star produces more light energy?

Showing 6 of 10 problems. The free PDF includes every problem plus the full answer key.

The free PDF includes all 3 pages — every problem plus the full answer key.

10 problems across 3 pages (worksheet + answer key)
Answer key included — every answer, ready to check
Standards: 5-ESS1-1
Skill: Students interpret data showing that a star's apparent brightness is affected by distance from Earth.
Suggested use: classwork, homework, or sub plans

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