- step one(4) -The solar nebula consisted of. -hydrogen, …
- step two(2) -A disturbance. …
- step three(2) -The solar nebula assumed a flat, disk shape. …
- step four(2) -Inner planets began to form from metallic. …
- step five(2) -Larger outer planets began forming from fragments.
What were the steps of the nebular theory?
The Nebular Theory would have started with a cloud of gas and dust, most likely left over from a previous supernova.
The nebula started to collapse and condense
; this collapsing process continued for some time. The Sun-to-be collected most of the mass in the nebula’s center, forming a Protostar .
What are the 6 stages of nebular theory in order?
- Formation begins and gravity causes the nebula to contract. …
- gravity pulls in the mass of the nebula in, then starts spinning, then the disk forms (planetary, solar disk); gravitational energy gets converted to thermal energy (heat); gets so hot, then nuclear fusion, then the sun is born.
How many stages are there to nebular theory?
Nebular theory explains that the formation of solar systems comprehend
six
differentiated stages which are: Nebula stage, which includes collapse.
What are the main events of the nebular hypothesis?
According to the nebular theory,
stars form in massive and dense clouds of molecular hydrogen—giant molecular clouds
(GMC). These clouds are gravitationally unstable, and matter coalesces within them to smaller denser clumps, which then rotate, collapse, and form stars.
What is encounter hypothesis?
Encounter Hypothesis:
One of the earliest theories for the formation of the planets
was called the encounter hypothesis. In this scenario, a rogue star passes close to the Sun about 5 billion years ago. … This material fragments into smaller lumps which form the planets.
What are the three major stages of planet formation and how do they happen?
Scientists believe that terrestrial planets, like Earth, formed by clumping together from dust and gas into into hot blobs of molten metal and rock several billion years ago. After becoming distinct planets, they went through four stages of formation:
Differentiation, Cratering, Flooding and Surface Evolution
.
How was nebular hypothesis formed?
According to this theory, the Sun and all the planets of our Solar System
began as a giant cloud of molecular gas and dust
. This could have been the result of a passing star, or shock waves from a supernova, but the end result was a gravitational collapse at the center of the cloud. …
What is the third stage in nebular hypothesis?
Step 3 (
Formation of a Planetesimal): Chunks of smaller rocky material collide (irregular shape
).
Who proposed nebular hypothesis?
The first version of the nebular hypothesis was proposed in 1755 by
the German philosopher Immanuel Kant and modified in 1796 by Pierre Laplace
. The nebula that according to this hypothesis condensed to form the solar system is called the solar nebula.
What are the different hypothesis explaining the origin of the solar system?
These are the
Nebular Hypothesis of Laplace, the Planetesimal Hypothesis of Chamberlin and Moulton, and the Capture Theory of See
. Darwings theory of Tidal Friction is scarcely a distinct hypothesis, but is mentioned separately on account of its application to all of the others.
How do you understand collision hypothesis on the origin of planets?
Answer: By the impact or collision hypothesis, the author means any theory that seeks to derive the Moon-forming material from the outcome of one or more collisions between the Earth and other Sun-orbiting bodies. The impacting body or bodies must be large – larger than the Moon and perhaps even larger than Mars.
What are the four theories of the solar system?
- The origin of the Solar System. …
- What are the theories for the origin of the Solar System? …
- The Accretion theory. …
- The Protoplanet theory. …
- The Capture theory. …
- The Modern Laplacian theory. …
- The Modern Nebular theory. …
- Conclusion.
How was the solar system formed step by step?
Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a
solar nebula
– a spinning, swirling disk of material.
What are the two hypotheses in the formation of the structure of Earth?
The first and most widely accepted theory,
core accretion
, works well with the formation of the terrestrial planets like Earth but has problems with giant planets. The second, the disk instability method, may account for the creation of these giant planets.
Why did solar nebula flatten into a disk?
Why did the solar nebula flatten into a disk?
The force of gravity from the planets pulled the material downward into a flat disk
. It flattened as a natural consequence of collisions between particles in the spinning nebula, changing random motions into more orderly ones.
What is nebula theory?
The nebular hypothesis is the idea that
a spinning cloud of dust made of mostly light elements
, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets [12].
What are the five steps to earth formation?
Starting 6600 million years ago, the stages involve the
formation of the core, the formation of the mantle, the formation of oceanic-type crust, the formation of ancient platforms
, and consolidation (the present stage) after which there will presumably be no more earthquakes or volcanic activity.
What are the 4 terrestrial planets?
The planets
Mercury, Venus, Earth, and Mars
, are called terrestrial because they have a compact, rocky surface like Earth’s terra firma. The terrestrial planets are the four innermost planets in the solar system.
What is binary star hypothesis?
Binary Star Hypothesis of Russell:
Russell
opined that there were two stars near the primitive sun in the universe
. … It was believed that the distance between two stars might have been about 48,00,000 to 64,00,000 km.
What are the six stages of Earth?
The six stage transformation of our planet from
black, gray, blue, red, white to green
is a wonderfully concise way of outlining the geological and biological evolution. More than half of the minerals now incorporated into the upper crust of our planet were produced by living organisms.
What is the first step of planet formation?
Emergence of Planets. Two processes are important in planet formation.
Condensation
is the production of solid dust grains as gases in the molecular cloud cool, and accretion is the collision of the dust grains to form clumps and progressively larger bodies, some of which grow into planets (Figure 10.2).
Why is Pluto not a planet?
Answer. The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet
because it did not meet the three criteria the IAU uses to define a full-sized planet
. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.”
What is the most widely accepted hypothesis of Earth origins?
The most widely accepted hypothesis of Earth’s origins is
the nebula hypothesis
.
What differentiates terrestrial planets from Jovian planets?
The main atmosphere of terrestrial planets is a gaseous mix of carbon dioxide and nitrogen gases, and all terrestrial planets have rocky surfaces. … Jovian planets are larger, further from the sun, rotate faster, have more moons, have more rings, are less dense overall and have
denser cores than terrestrial planets
.
What is the cloud of dust and gas called?
A nebula
is an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars. The roots of the word come from Latin nebula, which means a “mist, vapor, fog, smoke, exhalation.” Nebulae are made up of dust, basic elements such as hydrogen and other ionized gases.
What is Jeans Jeffreys tidal theory?
The tidal theory, proposed by James Jeans and Harold Jeffreys in 1918, is a variation of the planetesimal concept: it suggests that
a huge tidal wave, raised on the sun by a passing star, was drawn into a long filament and became detached from the principal mass
.
What are Jovian or gas giant planets?
The gas giants of our solar system are
Jupiter, Saturn, Uranus and Neptune
. These four large planets, also called jovian planets after Jupiter, reside in the outer part of the solar system past the orbits of Mars and the asteroid belt.
What T is classified in a smallest planet?
- Ceres is the earliest known and smallest of the current category of dwarf planets. …
- Pluto is the most well known of the dwarf planets. …
- Haumea is unique because of its ellipsoid shape, only just meeting the hydrostatic equilibrium criteria for dwarf planet status.
What was the frost line of the solar system?
In astronomy or planetary science, the frost line, also known as the snow line or ice line, is
the particular distance in the solar nebula from the central protostar where it is cold enough for volatile compounds such as water, ammonia, methane, carbon dioxide, and carbon monoxide to condense into solid ice grains
.
Is the solar system in a nebula?
Approximately 4.6 billion years ago, the solar system was
a cloud of dust and gas
known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.
What is the solar system hypothesis?
The most widely accepted hypothesis of planetary formation is known as
the nebular hypothesis
. This hypothesis posits that, 4.6 billion years ago, the Solar System was formed by the gravitational collapse of a giant molecular cloud spanning several light-years.
What came first the Sun or the moon?
After the sun spun to light, the planets of the solar system began to form. But it took another hundred million years for
Earth’s moon
to spring into existence. There are three theories as to how our planet’s satellite could have been created: the giant impact hypothesis, the co-formation theory and the capture theory.
What is the name of our sun?
We English speakers
always just call it the sun
. You sometimes hear English-speakers use the name Sol for our sun. If you ask in a public forum like this one, you’ll find many who swear the sun’s proper name is Sol. But, in English, in modern times, Sol is more a poetic name than an official one.
Will the moon ever crash into Earth?
Long answer: The Moon is in a stable orbit around Earth.
There is no chance that it could just change its orbit
and crash into Earth without something else really massive coming along and changing the situation. The Moon is actually moving away from Earth at the rate of a few centimetres per year.
Can two stars merge?
In general, distances between stars are so vast that
it is unlikely that any two will ever meet and collide
. But in some places, notably in globular clusters, stars can be crowded together much more tightly and may well collide with each other.
What would happen if Earth collided with another planet?
It would get so hot that everything on the side of the Earth about to get hit
would instantly vaporize
. For the rest of the Earth, the ground would become scorching magma. The collision would cause friction between the two planets. … This would have one big outcome – the Earth would collapse in on itself.
Which lists the major steps of solar system formation in the correct order?
Which lists the major steps of solar system formation in the correct order?
Collapse, Condensation, Accretion
.
What is the final step of the solar system formation?
More violent and rapid impact accretion. The final stage of accretion has been described as ‘
runaway accretion’
. Planetesimals are swept up into well defined zones around the sun which approximate to the present orbits of the terrestrial planets. The process leads eventually to a small number of large planetary bodies.
How was the Earth formed step by step?
When the solar system settled into its current layout about 4.5 billion years ago, Earth formed
when gravity pulled swirling gas and dust in to become the third planet from the Sun
. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle, and a solid crust.
