Stellar Evolution: Protostar Stage 3/18: Question Preview (ID: 24296)


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During the evolution of a star, what event takes at least a million years to occur?
a) secondary contraction
b) initial contraction
c) successive contraction
d) final contraction

After the initial contraction, what happens to the temperature of this gaseous body?
a) rises
b) falls
c) pulsates
d) fluctuates

After the initial contraction and when the temperature rises high enough, energy is radiated from the surface in the form of:
a) short-wavelength red light
b) long-wavelength orange light
c) short-wavelength blue light
d) long-wavelength red light

The gaseous body that continues to form, now appears as a large red object called a:
a) red giant
b) red star port
c) protostar
d) red dwarf

A protostar is a developing star not yet hot enough to engage in the process of:
a) nuclear fission
b) atomic transmission
c) atomic emission
d) nuclear fusion

As gravity continues to collapse the forming star, what part is heated more intensely than the outer layer?
a) lithosphere
b) asthenosphere
c) core
d) corona

When the core of a protostar reaches 10 million degrees Kelvin, the pressure is so great that the nuclear fusion of what gas begins?
a) hydrogate
b) hydroxide
c) hydrogen
d) heliogen

The heat from the process of hydrogen fusion causes the motion of the gases to:
a) decrease
b) increase
c) stay constant
d) pulsate

As the motion of the gases increases, it causes and increase in the outward:
a) gas pressure
b) gas exchange
c) gas production
d) gas decomposition

What does the forming star become when the outward pressure equals the inward force of gravity?
a) unstable main-sequence star
b) stable secondary red giant
c) stable main-sequence star
d) unstable secondary white dwarf

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