恒星的生命周期
Life Cycle of a Star
描述恒星从星云到主序星再到最终状态（白矮星、中子星或黑洞，取决于质量）的生命周期，并将生命周期与比氢更重的元素的起源联系起来。
Describe the life cycle of a star from nebula through main sequence to its end state (white dwarf, neutron star, or black hole depending on mass), and relate the life cycle to the origin of elements heavier than hydrogen
学习证据 / Evidence
- 描述类似太阳的恒星生命周期的主要阶段：星云 → 原恒星 → 主序星 → 红巨星 → 行星状星云 → 白矮星
- 解释更大质量的恒星最终会以超新星爆发结束，随后形成中子星或黑洞
- 说明恒星内部的核聚变会从氢和氦产生更重的元素
- Describes the main stages in the life cycle of a star similar to the Sun: nebula → protostar → main sequence → red giant → planetary nebula → white dwarf
- Explains that more massive stars end as a supernova followed by a neutron star or black hole
- States that nuclear fusion inside stars produces heavier elements from hydrogen and helium
评估问题 / Assessment
如果{{name}}被告知，他们血液中的铁是在数十亿年前爆炸的恒星内部形成的，他们能否解释恒星的生命周期以及元素是如何在恒星内部产生的？
If {{name}} was told that the iron in their blood was forged inside a star that exploded billions of years ago, could they explain the life cycle of a star and how elements are made inside stars?