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Approximately how massive is the Sun as compared to the Earth?
100 times
300 times
3000 times
300,000 times
One million times
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Which is denser?
The Sun, which is about 300,000 times more massive than the Earth.
The Earth (a solid object).
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The sunlight we receive on the Earth originates from the Sun's
Radiative zone.
Photosphere.
Chromosphere.
Corona.
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Approximately how long does energy take to travel from the core to the surface of the Sun?
A few seconds.
A few MINUTES
.
A thousand years.
16 million years.
10 billion years.
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Sunspots are dark because they are
Land masses like continents on the Earth.
Holes in the photosphere, allowing astronomers to view into the Sun's interior.
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Shadows from CLOUDS
in the Sun's atmosphere.
Slightly cooler REGIONS
meaning they emit less light than the surrounding areas.
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Which part of the Sun is covered with granules?
Corona
Chromosphere
Photosphere
Core
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The solar wind is created in the Sun's _______.
Core
Radiation zone
Convection zone
Corona
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The diameter of the Sun is determined by measuring its ____ and _____.
Volume; density
Distance; volume
Distance; angular size
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The temperature at the Sun's core is about _____.
15,000,000 K
1,500,000 K
150,000 K
15,000 K
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The energy in the Sun's core is produced by
Chemical reaction of hydrogen and helium.
Fusion of hydrogen to helium.
Radioactive decay.
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Release of gravitational potential energy.
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The Sun's atmosphere consists of the _____ and the _____.
Photosphere; chromosphere
Photosphere; corona
Chromosphere; corona
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How is the composition of the Sun today different than when it formed 4.6 billion years ago?
There is no difference, the composition has not changed.
There is now more hydrogen and less helium.
There is now more helium and less hydrogen.
The amount of hydrogen and helium has not changed but the amount of heavier elements has decreased.
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The Sun rotates _____ at its equator than at its poles.
Slower
The same
Faster
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A solar prominence is essentially
A cloud of hot gas lifting off the surface of the Sun.
An eruption of gas heated by the sudden recombination of opposite polarity parts of the Sun's magnetic
field.
A plasma confined to a magnetic tube sticking out of the surface of the Sun.
An aurora occurring in the Sun's atmosphere instead of the Earth's.
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Since nuclear fusion in the Sun creates energy from matter, why doesn't it violate the law of conservation of energy?
Conservation of energy only applies to mechanical and electrical systems, not to nuclear physics.
The energy actually comes from the motion of the four separate hydrogen atoms, which move less bound
together as one helium atom.
Matter and energy are equivalent, as expressed by Einstein's equation E = mc 2.
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It does, but conservation of energy is only a law in Newtonian physics, which does not work under the
conditions at the center of the Sun.
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Generally speaking, activity on the surface of the Sun is primarily driven by
Gravity.
Thermodynamics.
Electromagnetism.
Nuclear reactions.
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From the center out, the correct order of the parts of the Sun is
Core, convection zone, radiative zone, photosphere, chromosphere, corona.
Radiative zone, core, chromosphere, convection zone, photosphere, corona.
Core, convection zone, photosphere, chromosphere, corona, radiative zone.
Core, radiative zone, convection zone, photosphere, chromosphere, corona.
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The solar cycle is a result of the
Nuclear fusion at the core of the Sun.
Loss of energy in the Sun's magnetic field through flares, sunspots, and prominences.
Differential rotation of the Sun.
Motion in the convection zone cycling material into the Sun's core.
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In the Sun, nuclear fusion occurs
In the core and the radiative zone.
Only in the core.
Throughout the entire star.
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Although the Sun's core has a density much greater than rock it is considered a gaseous object because
The Sun's high internal temperatures prevent the atoms from bonding together to form a liquid or a solid.
A large fraction of the Sun's interior is made of electromagnetic radiation (light).
It is composed mostly of hydrogen.
The Sun formed from the solar nebula which itself was a large gas and dust cloud.
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