How Astronomers Know — Evidence Lab
Stellar Mass, Life Cycle and Element Formation
- Estimated time
- ~30 min
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Learning goals
- Different stages and sites of stellar life cycles produce different elements. Hydrogen and helium came mostly from the Big Bang; heavier elements were forged inside stars or in explosive events.
- HS-ESS1-3 — Students connect stages of stellar life cycles to the production of specific elements.
Help & glossary
- Use the hint ladder before checking your answer — hints get more specific.
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Question 1 of 2
Match each element (or group) with its main site of production.
Nucleosynthesis in low-mass stars, massive stars, supernovae, and neutron-star mergers each produce different elements. Big Bang nucleosynthesis produced only the very lightest.
- Hydrogen and most helium
- Carbon and oxygen
- Most iron-peak elements
- Gold and platinum
Sources
- Origins of the Elements — NASA Cosmic Origins — NASA · NASA Science · Accessed 2026-09-01