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Stars are born when gravity pulls gas and dust together with enough pressure to ignite nuclear fusion true or false?
True.
Stars are formed from interstellar clouds because of?
Because of gravity. Only gravity can pull large clouds together with enough force to overcome gas pressure.
Can a planet collapse under its own gravity?
No, a planet does not collapse because gravity isn't strong enough to provide enough pressure to crush a planet. You might make a planet heavier and heavier as to increase its gravity but at some point the pressure in the planet's core will be high enough to support nuclear fusion and the planet will have changed into a star. At that point radiative pressure also begins to fight gravity.
What does gravity and pressure do?
Gravity and pressure both do lots of things. In the center of a star (such as our sun, Sol) it is the gravitational force of the star's mass which holds it together as a star, rather than an expanding cloud of gas which it otherwise would be, and which also causes the high pressure that exists in the center of the star. Stars are composed of a substance known as plasma, which is a super heated gas in which all the electrons are ionized rather than being bound to atomic nuclei. It is the weight of all this plasma which presses down on the center of the star causing the extremely high pressure and temperature which allows nuclear reactions to take place. Only when atomic nuclei are under enormous pressure will they ever get close enough to undergo nuclear reactions, and that is because they are all positively charged, and therefore repel each other. So gravity and pressure, working together, make it possible for the sun and stars to shine. Without gravity and pressure the universe would be a dark, cold place.
What gas giant has nuclear fusion on it?
None. Nuclear fusion occurs in stars. Jupiter, for example, has all the right ingredients to be a star but as huge as it is, it doesn't have enough mass to generate the heat and internal pressure facilitate nuclear fusion. Hope this helps :-)
Which of these develop when gravity pulls gas and dust together with enough pressure to ignite nuclear fusion?
Stars develop when gravity pulls gas and dust together with enough pressure to ignite nuclear fusion. This process starts in the core of the collapsing cloud, where the temperature and pressure become high enough for nuclear reactions to occur, initiating the star's life cycle.
Stars are born when gravity pulls gas and dust together with enough pressure to ignite nuclear fusion true or false?
True.
Which of these develop when gravity pulls gas and dust together with enough pressure to ignite nuclear fission?
The list of choices posted with the question doesn't include anything that fits that description. It sounds something like a "star", but in a star, it would be "fusion", not "fission".
Stars are formed from interstellar clouds because of?
Because of gravity. Only gravity can pull large clouds together with enough force to overcome gas pressure.
Why do stars combine together?
Stars combine together due to the force of gravity pulling them towards each other. When enough material gathers in one place, the pressure and temperature increases, igniting nuclear fusion in the core. This fusion process releases energy and keeps the star shining.
Can a planet collapse under its own gravity?
No, a planet does not collapse because gravity isn't strong enough to provide enough pressure to crush a planet. You might make a planet heavier and heavier as to increase its gravity but at some point the pressure in the planet's core will be high enough to support nuclear fusion and the planet will have changed into a star. At that point radiative pressure also begins to fight gravity.
At what point does a star turn on?
A star 'turns on' when it becomes large enough that there is enough pressure squeezing its insides to start a nuclear reaction. The pressure comes from gravity of the mass of the star. the planet Jupiter could become a star if it got significantly larger.
What is gravity's job in the universe?
Gravity basically makes things come together, and keep together. For example, due to gravity: * Galaxies form and keep together * Stars form and keep together * Stars get hot enough for nuclear fusion to start * Planets form and keep together * Planets keep around their stars, instead of wandering off into space
Why is nuclear fusion possible in the sun?
Nuclear fusion occurs in stars due to the shear density of a star. They are so dense that the pressure in the core ionizes hydrogen, stripping them into bare atoms. The inward gravitational pull of the dense core causes the atoms to be smashed together, fusing into helium. The energy from the fusion provides enough outward pressure to counteract the core's own gravity.
Which of the following best illustrates the role that gravity played in the formation of your solar system?
Gravity compresses gases at the center of a solar nebula until temperatures are high enough for nuclear fusion to occur.
What role did gravity play in forming the sun?
The sun (Sol), like any star, gained so much mass (of mainly hydrogen, with some helium and lithium) that its core began a fusion reaction. Without gravity, it would not have had enough mass, and by extent pressure, to sustain fusion, and therefore would not be a star.
What force causes a nebula to become a star?
Gravitational attraction pulls gas and dust together in a nebula, causing it to condense and heat up. When the pressure and temperature in the core of the nebula become high enough, nuclear fusion reactions begin, initiating the process of becoming a star.
