What do we mean when we say that the Sun is in gravitational equilibrium quizlet?
What do we mean when we say that the Sun is in gravitational equilibrium? There is a balance within the Sun between the outward push of pressure and the inward pull of gravity.
What do we mean when we say that the Sun is in energy balance?
What do we mean when we say that the Sun is in energy balance? The amount of energy released by fusion in the Sun's core equals the amount of energy radiated from the Sun's surface into space.
Which of the following is the best answer to the question why does the Sun shine?
Which of the following is the best answer to the question, "Why does the Sun shine?" As the Sun was forming, gravitational contraction increased the Sun's temperature until the core become hot enough for nuclear fusion, which ever since has generated the heat that makes the Sun shine.
What is the Sun made of by mass quizlet?
The sun is made of 71% hydrogen, 27% helium, and 2% heavier elements (carbon and oxygen).
What two forces are balanced in gravitational equilibrium describe how gravitational equilibrium makes the Sun hot and dense in its core?
What two forces are balanced in gravitational equilibrium? What does it mean for the Sun to be in energy balance? Gravity and thermal pressure (the heat from fusion in the core causes pressure.)
How does the Sun generate energy today group of answer choices gravitational contraction gradually expanding in size nuclear fusion nuclear fission chemical reactions?
Although the Sun does not generate energy by gravitational contraction today, this energy-generation mechanism was important when the Sun was forming. The Sun generates energy primarily by nuclear fission. Nuclear power plants on Earth create energy in the same way as the Sun.
What do we mean when we say that the Sun is in gravitational equilibrium group of answer choices?
What do we mean when we say that the Sun is in gravitational equilibrium? There is a balance within the Sun between the outward push of pressure and the inward pull of gravity.
Why is it called energy balance?
The earth-atmosphere energy balance is achieved as the energy received from the Sun balances the energy lost by the Earth back into space. In this way, the Earth maintains a stable average temperature and therefore a stable climate.
Which of the following best explains why the Sun’s luminosity?
Which of the following best explains why the Sun's luminosity gradually rises over billions of years? The planets need more and more energy to maintain any life on them as time goes on, and therefore the Sun must bet hotter.
Which of the following best explains why the Sun’s luminosity gradually rises over billions of years?
Which of the following best explains why the sun's luminosity gradually rises over billions of years? Fusion gradually decreases the number of independent particles in the core, allowing gravity to compress and heat the core, which in turn increases the fusion rate and the Sun's luminosity.
What is sun made of quizlet?
The sun is made of 71% hydrogen, 27% helium, and 2% heavier elements (carbon and oxygen).
What is the Sun made of?
It does not have easily identifiable boundaries like rocky planets like Earth. Instead, the sun is composed of layers made up almost entirely of hydrogen and helium. These gases carry out different functions in each layer, and the sun's layers are measured by their percentage of the sun's total radius.
What two forces are balanced in gravitational equilibrium What does it mean for the Sun to be in energy balance quizlet?
What does it mean for the Sun to be in energy balance? Gravity and thermal pressure (the heat from fusion in the core causes pressure.) The Sun is not expanding or contracting because the energy from gravity pulling inward is equal to the gas pressure pushing outward. The energy is in equilibrium.
What is gravitational equilibrium How does the Sun and other stars achieve it?
According to our current model of solar-energy gener- ation by nuclear fusion, the Sun maintains its size through a balance between two competing forces: gravity pulling inward and pressure pushing outward. This balance is called gravitational equilibrium (or hydrostatic equilibrium).
Which method of energy generation is used by the Sun today quizlet?
The Sun generates energy primarily by nuclear fission. Nuclear power plants on Earth create energy in the same way as the Sun.
How does the Sun generate energy today quizlet?
The Sun generates energy primarily by nuclear fission. The corona and chromosphere are hotter than the photosphere.
How does the Sun maintain its balance or equilibrium?
The Sun is held together by gravity. The Sun maintains its current size because its interior is very hot which leads to a large internal gas pressure which counteracts the tendency of gravity to contract the Sun. The punishment for falling out of mechanical equilibrium is swift.
What forces keep the Sun in equilibrium?
However, the Sun is a giant ball of gas, and the pressure to stop collapse must come from within the Sun. In fact, it is thermal and radiation pressures which create an outward expansion force which balances the inward contraction due to the force of gravity. This balance is called hydrostatic equilibrium.
What role do greenhouse gases play?
Greenhouse gases, such as carbon dioxide, methane, nitrous oxide, and certain synthetic chemicals, trap some of the Earth's outgoing energy, thus retaining heat in the atmosphere.
Why the temperature of the stratosphere increases with altitude?
In the stratosphere, temperature generally increases as altitude increases due to the increasing absorption of ultraviolet radiation by the ozone layer.
Which of the following would best describe generation of the Sun’s energy?
Which of the following correctly compares the Sun's energy generation process to the energy generation process in human-built nuclear power plants? The Sun generates energy by fusing small nuclei into larger ones, while our power plants generate energy by the fission (splitting) of large nuclei.
What is the name of the surface of the Sun?
The part of the Sun we call its surface – the photosphere – is a relatively cool 10,000 °F (5,500 °C). In one of the Sun's biggest mysteries, the Sun's outer atmosphere, the corona, gets hotter the farther it stretches from the surface.
Why does the Sun’s rate of fusion gradually rise over billions of years?
Why must the Sun's rate of fusion gradually rise over billions of years? Fusion reactions decrease the overall number of particles in the core, causing the core to shrink, converting gravitational potential energy into thermal energy, and increasing the rate of fusion.
How hot is the Sun’s plasma quizlet?
The Sun's central core is plasma with a temperature of around 27 million C. A process that releases vast amounts of energy. This energy moves outward, toward the outer layers of the Sun.
What is plasma in the Sun?
The Sun's plasma is so hot that the most energetic charged particles can escape from the Sun's gravity and fly away, out into space. We call this plasma the solar wind because it blows out away from the Sun and past the planets, interacting with their magnetic fields and/or atmospheres.
Who created the Sun?
Formation. The Sun formed about 4.6 billion years ago in a giant, spinning cloud of gas and dust called the solar nebula. As the nebula collapsed under its own gravity, it spun faster and flattened into a disk.
What two forces are balanced in gravitational equilibrium What does it mean for the Sun to be in energy balance?
What does it mean for the Sun to be in energy balance? Gravity and thermal pressure (the heat from fusion in the core causes pressure.) The Sun is not expanding or contracting because the energy from gravity pulling inward is equal to the gas pressure pushing outward. The energy is in equilibrium.
What two forces are balanced in gravitational equilibrium describe how gravitational equilibrium makes the Sun hot and dense in its core quizlet?
gravitational equilibrium is a balance b/w the inward pull of gravity & the outward push of internal gas pressure. as the weight increases in the lower layers of the sun, the pressure also increases to maintain this balance.
What is gravitational equilibrium?
(‚grav·ə′tā·shən·əl ‚ē·kwə′lib·rē·əm) (astrophysics) The condition of a star in which the weight of overlying layers at each point is balanced by the total pressure at that point.
How does gravitational equilibrium make the Sun hot and dense in its core?
At each higher level, the overlying weight is less, so the pressure decreases. Gravitational equilibrium in the Sun means that the pressure increases with depth, making the Sun extremely hot and dense in its central core (Fig- ure 15.2).