Question 1

Stars with a mass from 0.01 M⨀ to 0.08 M⨀ are very different from the Sun because they:

Accepted Answer

A) do not have strong enough gravity to form planets 
B) have much higher temperatures than the Sun 
C) cannot successfully execute the proton-proton chain reactions 
D) form much faster than the Sun did 
E) do not exhibit sunspots 
A) do not have strong enough gravity to form planets 
B) have much higher temperatures than the Sun 
C) cannot successfully execute the proton-proton chain reactions 
D) form much faster than the Sun did 
E) do not exhibit sunspots

Question 2

If you wanted to study regions where star formation is currently happening you could use:

Accepted Answer

A) H-alpha emission to look for O and B stars 
B) 21 cm radiation to find neutral hydrogen clouds 
C) radio emission from carbon monoxide (CO)to find molecular cloud cores 
D) infrared emission to identify T Tauri stars 
E) all of the above 
A) H-alpha emission to look for O and B stars 
B) 21 cm radiation to find neutral hydrogen clouds 
C) radio emission from carbon monoxide (CO)to find molecular cloud cores 
D) infrared emission to identify T Tauri stars 
E) all of the above

Question 3

The Hayashi track of a low-mass protostar in the H-R diagram is a path of approximately constant:

Accepted Answer

A) density 
B) luminosity 
C) age 
D) temperature 
E) radius 
A) density 
B) luminosity 
C) age 
D) temperature 
E) radius

Question 4

The interstellar medium is divided up into three different kinds of gas clouds: cold gas at 10 K,warm gas at 8000 K,and hot gas at about 1 million K.

Accepted Answer

A) True 
 B)False

Stars with a mass from 0.01 M_⨀ to 0.08 M_⨀ are very different from the Sun because they:

If you wanted to study regions where star formation is currently happening you could use:

The Hayashi track of a low-mass protostar in the H-R diagram is a path of approximately constant:

The interstellar medium is divided up into three different kinds of gas clouds: cold gas at 10 K,warm gas at 8000 K,and hot gas at about 1 million K.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters

Exam 15: Star Formation and the Interstellar Medium

Stars with a mass from 0.01 M⨀ to 0.08 M⨀ are very different from the Sun because they:

If you wanted to study regions where star formation is currently happening you could use:

The Hayashi track of a low-mass protostar in the H-R diagram is a path of approximately constant:

The interstellar medium is divided up into three different kinds of gas clouds: cold gas at 10 K,warm gas at 8000 K,and hot gas at about 1 million K.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters

Stars with a mass from 0.01 M_⨀ to 0.08 M_⨀ are very different from the Sun because they: