Question

main sequence stars change quickly when they grow into a red giant. explanation: be sure to discuss the role of the force of gravity and/or fusion force in your explanation for why a main sequence star eventually grows in size to become a red giant. dont forget to include evidence to support your claim. depending on a stars initial mass, the last stage of a stars life cycle is either a white dwarf, neutron star, or black hole. these are some of the most dense objects in the universe. explanation: be sure to discuss the role of the force of gravity and/or fusion force in your explanation for why stars become much smaller and incredibly dense (compact) at the end of their life cycles.

Explanation:

Main - sequence stars convert hydrogen to helium in their cores via nuclear fusion. As hydrogen fuel runs low, the core contracts due to gravity. This heats up the outer layers, causing the star to expand and become a red - giant. For the end - stage of a star's life cycle, when fusion stops, gravity causes the star to collapse. In low - mass stars, electron degeneracy pressure resists further collapse, forming white dwarfs. In high - mass stars, neutron degeneracy pressure can form neutron stars, and for extremely massive stars, gravity overcomes all resistance, creating black holes. Evidence includes observations of different types of stars in various life stages in the universe, such as the presence of red giants in star clusters and the detection of neutron stars and black holes through their gravitational effects on nearby matter and light.

Answer:

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