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Grade 12 Stars, Galaxies & the Big Bang Worksheet with Answers
Grade 12 (US) · Year 13 (UK) · Class 12 (India) · Science
Unit 1: Space SystemsStars & the UniverseNGSS HS-ESS1-1
How stars shine and evolve, galaxies, and evidence for the Big Bang. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comStars, Galaxies & the Big Bang
Grade 12 · Science
Name
Class
Date
Learning goal: Stars & the Universe · NGSS HS-ESS1-1
Directions: This worksheet has 2 parts. Read the instructions at the start of each part.
RememberOrbits and stars
Match each clue to the right word. Write the letter in the box.
- 1What element do stars mainly fuse in their cores?
- 2What powers a star?
- 3Where do elements heavier than iron mostly form?
- 4What galaxy do we live in?
- AIn supernova explosions
- BHydrogen
- CMilky Way
- DNuclear fusion
Answer each question. Use full sentences where you can.
- 5
What will our sun become at the end of its life?
- 6
What forms when a very massive star collapses?
- 7
What is the cosmic microwave background?
- 8
What evidence shows the universe is expanding?
- 9
What is a light-year?
- 10
What theory describes the origin of the universe?
- 11
Why do hotter stars look blue?
- 12
What is a galaxy?
★ Challenge corner for fast finishers
Why does a spinning ice skater spin faster when she pulls her arms in?
How did I do?
Teacher's comments
Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/12/universe
Answer key — Stars, Galaxies & the Big Bang (Grade 12)
- 1.B — hydrogen (into helium)
- 2.D — nuclear fusion
- 3.A — in supernova explosions (and neutron star mergers)
- 4.C — the Milky Way
- 5.a red giant, then a white dwarf
- 6.a neutron star or a black hole
- 7.leftover radiation from the early universe
- 8.light from distant galaxies is redshifted
- 9.the distance light travels in one year
- 10.the Big Bang theory
- 11.they emit more short-wavelength light
- 12.a huge system of stars, gas and dust held together by gravity
- ★conservation of angular momentum
Answer key (click to show)
- 1.B — hydrogen (into helium)
- 2.D — nuclear fusion
- 3.A — in supernova explosions (and neutron star mergers)
- 4.C — the Milky Way
- 5.a red giant, then a white dwarf
- 6.a neutron star or a black hole
- 7.leftover radiation from the early universe
- 8.light from distant galaxies is redshifted
- 9.the distance light travels in one year
- 10.the Big Bang theory
- 11.they emit more short-wavelength light
- 12.a huge system of stars, gas and dust held together by gravity
- ★conservation of angular momentum (challenge corner)
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