Stellar Evolution

Stellar Evolution

6th Grade - University

20 Qs

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Stellar Evolution

Stellar Evolution

Assessment

Quiz

Other, Science, Physics

6th Grade - University

Practice Problem

Hard

Created by

David Allan

Used 56+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Our Sun, along with most of the stars in our neighborhood, probably formed …

… about 10 million years ago.

… a few million years ago.

… hundreds of millions of years ago.

… billions of years ago.

… at the beginning of the universe.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the force that keeps a main sequence star

from blowing apart?

radiation pressure

electron degeneration pressure

the strong force

magnetism

gravitation

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which event marks the birth of a star?

collapse of an interstellar cloud

formation of the planetary nebula

fusion of hydrogen atoms into helium atoms

formation of a photosphere

instability in an interstellar cloud

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when an interstellar cloud fragment shrinks?

It blocks the passage of light.

Density rises.

Temperature rises.

Pressure rises.

All of these.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A typical protostar may be several thousand times more luminous than the Sun. What is the source of this energy?

chemical combustion of hydrocarbons

nuclear fusion in its core

from the release of gravitational energy as the protostar continues to shrink

the ionization of the gas as it heats up

from nearby hot stars or supernovae that have initiated the star formation process

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is characteristic of a main sequence star?

It has a mass less than the Sun's.

It has rapid rotation and a strong stellar wind.

Nuclear fusion in the core varies due to the amount of gravitational contraction that

occurs and which heavy elements are produced.

The star is in a state of equilibrium between gravitational contraction and radiation

pressure.

All of these answers are correct.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

On an H-R diagram, a protostar would be…

…above and to the right of the main sequence.

…below and to the left of the main sequence.

…below and near the right side of the main sequence.

…above and near the upper left of the main sequence.

…on the main sequence at the extreme lower right.

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