POGIL Life Cycle of Stars - 10524993.pdf - Life Cycle of Stars ... - Free Printable

It looks like you've uploaded an image containing a worksheet titled "Life Cycle of Stars", specifically focusing on Model 1 – Three Stars Have Birth to Death. The worksheet appears to include diagrams of stars at various stages of their life cycles, along with questions and spaces for answers.

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However, based on the title and typical structure of such worksheets, here’s what the content likely includes:

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Typical Content of "Life Cycle of Stars" Worksheet

#### Model 1: Three Stars Have Birth to Death
This model usually shows three different types of stars (e.g., low-mass, medium-mass, high-mass) going through stages from birth to death.

##### Stages of Star Life Cycles:
1. Nebula – A cloud of gas and dust where stars form.
2. Protostar – A collapsing cloud that heats up and forms a star.
3. Main Sequence Star – Stable phase where fusion occurs (hydrogen → helium).
4. Red Giant / Red Supergiant – When hydrogen runs out; outer layers expand.
5. Planetary Nebula / Supernova – Outer layers are ejected.
6. White Dwarf / Neutron Star / Black Hole – Final remnant depending on mass.

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Common Questions on Such a Worksheet:

1. What is the first stage in the life cycle of a star?
2. How does a star maintain stability during the main sequence?
3. What happens to a low-mass star like our Sun at the end of its life?
4. What happens to a high-mass star at the end of its life?
5. Compare the life spans of low-mass vs. high-mass stars.

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Example Solution (if your worksheet has these questions):

#### Question 1:
*What is the first stage in the life cycle of a star?*
Answer: The first stage is the nebula, a cloud of gas and dust.

#### Question 2:
*How does a star maintain stability during the main sequence?*
Answer: During the main sequence, the star maintains stability through a balance between outward pressure from nuclear fusion and inward pull of gravity.

#### Question 3:
*What happens to a low-mass star like our Sun at the end of its life?*
Answer: It expands into a red giant, sheds its outer layers forming a planetary nebula, and leaves behind a white dwarf.

#### Question 4:
*What happens to a high-mass star at the end of its life?*
Answer: It explodes in a supernova, and the core collapses into either a neutron star or a black hole.

#### Question 5:
*Compare the life spans of low-mass vs. high-mass stars.*
Answer: Low-mass stars live longer (billions of years), while high-mass stars burn fuel quickly and live shorter lives (millions of years).

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