What is the single most important property of a star that will determine its evolution quizlet?
degenerate-matter object gets smaller as it gets more massive. at the top left of the main sequence. What is the single most important property of a star that will determine its evolution? As a star leaves the main sequence, it moves up and to the right on the H-R diagram.
What is the single most important quantity in determining the evolution of a star?
Mass: the most important factor in determining the life of a star. Gravity & Internal heat: balance that determines evolutionary stage of a star's life.
What is the single most important property of a star?
Mass – The single most important property that determines other properties of the star. Luminosity – The total amount of energy (light) that a star emits into space.
What does the evolution of a star depend on?
Like the rate of formation of a star, the subsequent rate of evolution on the main sequence is proportional to the mass of the star; the greater the mass, the more rapid the evolution.
What is the most important concept about stars on the main sequence quizlet?
While on the main sequence, a star is stable because there is a balance between its self-gravity trying to make the star collapse in on itself and the outward pressure of the gas heated by nuclear fusion trying to make it expand.
How does mass determine the main sequence lifetime of a star?
The overall lifespan of a star is determined by its mass. Since stars spend roughly 90% of their lives burning hydrogen into helium on the main sequence (MS), their 'main sequence lifetime' is also determined by their mass.
What is the evolution of a star?
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe.
How do stars form and evolve?
Stars form from an accumulation of gas and dust, which collapses due to gravity and starts to form stars. The process of star formation takes around a million years from the time the initial gas cloud starts to collapse until the star is created and shines like the Sun.
What property determines star type?
Astronomers group stars into general types based on their temperature. Temperature is chosen because the color of a star depends on the temperature and color is a easily seen characteristic, regardless of the distance. However, using color as a temperature probe gives only a crude measurement of the star's temperature.
What is the evolution of the star?
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe.
What is the single most important characteristic in determining the course of a star’s evolution?
Mass is the single most important property of a star. It determines the evolution of a star as well as its lifetime (e.g. lower mass stars live longer).
What main factor determines the stages a star will follow after the main sequence?
mass The amount of mass a star has determines which of the following life cycle paths it will take from there. The life cycle of a low mass star (left oval) and a high mass star (right oval).
What are the two most important intrinsic properties used to classify stars?
The two most important intrinsic properties which are used to classify stars are luminosity and surface temperature.
How do you determine a star’s life?
The lifetime of a star is proportional to the amount of fuel it has (its mass) divided by the rate at which it expends the fuel (its luminosity). Therefore, you can estimate the lifetime t to be proportional to M/L.
What are two main requirements for a star to be on the main sequence?
Main Sequence Membership For a star to be located on the Main Sequence in the H-R diagram: It must be in Hydrostatic Equilibrium (Pressure balances Gravity) It must be in Thermal Equilibrium (Energy Generation balances Luminosity) It must generate energy by "burning" Hydrogen into Helium in its core.
What are the properties of stars?
PROPERTIES OF STARS
- DISTANCE. This is determined from trigonometric and spectroscopic parallaxes. …
- LUMINOSITY. This is the amount of energy generated in the star and released as electromagnetic radiation.
- BRIGHTNESS. …
- RADIUS. …
- CHEMICAL COMPOSITION. …
- TEMPERATURE.
What determines a star’s life cycle?
A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born.
Why mass is the most important property of a star?
Mass is the most important stellar property. This is because a star's life is a continuous fight against gravity, and gravity is directly related to mass. The more massive a star is, the stronger its gravity. Mass therefore determines how strong the gravitational force is at every point within the star.
What are the two most important properties used to classify stars?
The two most important intrinsic properties which are used to classify stars are luminosity and surface temperature.
What physical property of a star does the spectral type measure?
Cards
| Term Which statement about stellar motion is incorrect | Definition Proper motion is measured in intervals of 6 months |
|---|---|
| Term What physical property of a star does the spectral type measure? | Definition temperature |
| Term Which star would be the hottest? | Definition B0 |
•Feb 27, 2012
Which is the most useful in classifying stars?
Color Color is the most common way to classify stars.
What defines a main sequence star?
Definition of main sequence : the group of stars that on a graph of spectrum versus luminosity forms a band comprising 90 percent of stellar types and that includes stars representative of the stages a normal star passes through during the majority of its lifetime.
Why is mass so important to a star’s life?
Mass is the most important stellar property. This is because a star's life is a continuous fight against gravity, and gravity is directly related to mass. The more massive a star is, the stronger its gravity. Mass therefore determines how strong the gravitational force is at every point within the star.
Which of the following is the major factor predicting the fate of a star?
Key Concepts. The ultimate fate of a star depends on its initial mass. A massive star ends with a violent explosion called a supernova. The matter ejected in a supernova explosion becomes a glowing supernova remnant.
What is the most important attribute of a star?
Two of the most important characteristics of stars are temperature and absolute magnitude.
What is a property of a star?
A star can be defined by five basic characteristics: brightness, color, surface temperature, size and mass.
What are the main properties of stars?
A star can be defined by five basic characteristics: brightness, color, surface temperature, size and mass.
- Brightness. Two characteristics define brightness: luminosity and magnitude. …
- Color. A star's color depends on its surface temperature. …
- Surface Temperature. …
- Size. …
- Mass.
Mar 13, 2018
What determines a star’s type?
Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M. O and B stars are uncommon but very bright; M stars are common but dim..
What is the main composition of stars?
Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements.
What determines a star’s spectrum?
The general characteristics of the spectra of stars depend more on temperature variations among the stars than on their chemical differences. Spectral features also depend on the density of the absorbing atmospheric matter, and density in turn is related to a star's surface gravity.