Question 1

Stars that pulsate in and out are called ______.&#10;A) protostars&#10;B) protoplanets&#10;C) variable stars&#10;D) pulsating clouds

Accepted Answer

Variable stars are stars that pulsate in and out, changing their brightness in a regular or semi-regular pattern.

Question 2

A cloud of ejected gas surrounding a dying star is called a ______.&#10;A) planetary nebula&#10;B) star cloud&#10;C) reflection nebula&#10;D) absorption nebula

Accepted Answer

A planetary nebula is formed when a star blows off its outer layers after it has run out of fuel to burn, creating a cloud of gas and dust around it. This process occurs in the late stages of a star's life, before it collapses into a white dwarf.

Question 3

The proper sequence of stages in the life of a star is&#10;A) red giant, protostar, main sequence.&#10;B) protostar, red giant, main sequence.&#10;C) red giant, main sequence, protostar.&#10;D) protostar, main sequence, red giant.

Accepted Answer

The correct sequence for the stages in the life of a star begins with a protostar, which is a very young star still in the process of forming. Once the protostar has accumulated enough mass and its core temperature becomes sufficiently high, nuclear fusion starts, and it enters the main sequence phase, where it spends most of its life. Eventually, as the star exhausts its hydrogen fuel, it expands into a red giant.

Question 4

A high mass star will die in a large explosion called a ______.

Accepted Answer

The answer of A high mass star will die in...

Question 5

The remnant of the most massive stars will be ______ .

Accepted Answer

The answer of The remnant of the most massive stars...

Question 6

Our sun will die as a white dwarf.

Accepted Answer

The Sun, a medium-sized star, will eventually exhaust its nuclear fuel and evolve through a red giant phase before shedding its outer layers and leaving behind a dense core that cools and fades over time as a white dwarf.

Question 7

Stellar computer models help us trace a star's life from birth to death.

Accepted Answer

Stellar computer models simulate the physical processes occurring within stars, allowing scientists to predict and understand the various stages of a star's life cycle, from its formation in a nebula to its ultimate fate as a white dwarf, neutron star, or black hole.

Deck 60: Overview of Stellar Evolution