1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
cupoosta [38]
2 years ago
13

What are the two main ways a star can live based on it mass?

Biology
2 answers:
melisa1 [442]2 years ago
5 0

Answer:

Stars spend the majority of their lives fusing hydrogen, and when the hydrogen fuel is gone, stars fuse helium into carbon.

Andrej [43]2 years ago
3 0

Answer:

Main sequence stars fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe, including the sun, are main sequence stars. These stars can range from about a tenth of the mass of the sun to up to 200 times as massive.

Stars start their lives as clouds of dust and gas. Gravity draws these clouds together. A small protostar forms, powered by the collapsing material. Protostars often form in densely packed clouds of gas and can be challenging to detect.

"Nature doesn't form stars in isolation," Mark Morris, of the University of California at Los Angeles (UCLS), said in a statement. "It forms them in clusters, out of natal clouds that collapse under their own gravity."

Smaller bodies — with less than 0.08 the sun's mass — cannot reach the stage of nuclear fusion at their core. Instead, they become brown dwarfs, stars that never ignite. But if the body has sufficient mass, the collapsing gas and dust burns hotter, eventually reaching temperatures sufficient to fuse hydrogen into helium. The star turns on and becomes a main sequence star, powered by hydrogen fusion. Fusion produces an outward pressure that balances with the inward pressure caused by gravity, stabilizing the star.

How long a main sequence star lives depends on how massive it is. A higher-mass star may have more material, but it burns through it faster due to higher core temperatures caused by greater gravitational forces. While the sun will spend about 10 billion years on the main sequence, a star 10 times as massive will stick around for only 20 million years. A red dwarf, which is half as massive as the sun, can last 80 to 100 billion years, which is far longer than the universe's age of 13.8 billion years. (This long lifetime is one reason red dwarfs are considered to be good sources for planets hosting life, because they are stable for such a long time.)

Explanation:

I hope this helped!

You might be interested in
For plants and other organisms to develop differences among their respective species the alleles of their genes must contain var
olasank [31]

A) <u>Mutation</u> is the original source of variations for plants and other organisms  which develops differences among their respective species

Explanation:

Genetic variation leads to the natural differences between each individual and among individuals of a species. The main cause for this variation is due to alleles that cause variations in the composition of genes or the DNA sequences.  

A mutation is a genetic variation which leads to the creation of a new allele in a species population. Each variation in the DNA sequence leads to an allele formation and each allele leads to a difference in character or trait between individuals since they are the alternate version of the original genes.  

Although genetic variations could be brought about by crossing over, random fertilization, or independent assortment; mutation is the original source because it provides the basic raw material for all the evolutionary changes.

8 0
3 years ago
What is the most appropriate method to prepare a sample of cheek cells for PCR?
Dmitry [639]

Answer:

Extraction of genomic DNA

Explanation:

Resuspend the cells(any number), smaller numbers also work, in 10-20 ul of TE buffer or milli Q water. boil for 5-10 min in a waterbath, quick chill, short spin. use the supernatant as a template for PCR.

If cells are very less, u can directly add cells to the PCR reaction without enzyme,boil for 5-10 min in a waterbath, let it cool slowly, short spin. Add enzyme to the supernatant and start the reaction at extension step followed by normal PCR reaction steps.

5 0
2 years ago
On the electromagnetic spectrum,
Bas_tet [7]
<span>C. less energy than X-rays and gamma rays.

Hope this helps!
</span>
7 0
3 years ago
Which of these describes the loss of biodiversity?
Brums [2.3K]

The answer is option B "declining number and variety of the species in an area." Biodiversity is a variety of life for example a ecosystem has many species which makes it a biodiversity. Now a loss of a biodiversity would be loosing a huge amount of species in that area or ecosystem which would mean the answer is option B.

Hope this helps.

7 0
3 years ago
Which of the following is the best definition of energy? A. the ability to generate electricity B. the ability to generate heat
PilotLPTM [1.2K]
The phrase that best describe the word "energy" is letter "C. the ability to do work". The unit most commonly used to express energy is Joules (J) which is also derived from the equation of work which is the product of force and the distance that a body moves parallel to the force applied. 
4 0
2 years ago
Read 2 more answers
Other questions:
  • Identify the type of symmetry displayed for each item. then, indicate how you came to your conclusion:
    13·1 answer
  • In this turn-of-the century biology chart, we see members of the kingdom Protists in various body forms. All of these protists h
    7·1 answer
  • Which is correct about the electron transport chain (ETC) in the mitochondria?
    9·1 answer
  • All marsupials except one group exist on the continent
    11·1 answer
  • Task 1: Scientific theory and law
    15·1 answer
  • How are viruses, bacteria, and parasites alike?
    8·1 answer
  • 1) Ultimately, where does all energy come from that plants and animals use? A: Coal B: Natural gas C: Oil D: The sun​
    5·1 answer
  • As you walk down the hall on the way to class, several students sneeze. You unknowingly inhale some of the droplets
    13·1 answer
  • Identify the correct number of protons, neutrons, and electrons of an element with the following information
    7·1 answer
  • Given your knowledge of mitosis now, let’s pretend you are the scientist creating these phases. Where might you create a new pha
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!