answersLogoWhite

0


Best Answer

The main reason that the inner planets are much more rocky and the outer planets are gaseous has to do with the condensation of materials. When the Solar System was being formed according to the "Solar Nebula Hypothesis", the Solar System began as a rotating disk of gas and dust. The majority of this material formed the Sun, and the rest of it was left to form the planets. The material closest to the Sun was obviously the hottest, and therefore any lighter materials such as gases would have evaporated and been vaporized by the Sun's heat. The materials with a higher melting/condensing point, such as iron, nickel, and other rock-forming substances could remain solid at these higher temperatures and therefore eventually accreted (came together) to form the inner, or Terrestrial planets. The materials with lower condensing points, gases such as methane, ammonia, water etc, were able to condense out further from the Sun where it was cooler and accreted into the gas giants we have in the outer part of the Solar System called the Jovian planets. It is believed that the Jovian planets started with large "seeds" of solid material made of up of rock and ices, and then their gravity attracted all of the gas in the region. This will unfortunately have to remain a theory as we would never be able to visit the centers of the Jovian planets due to the tremendous pressures that exist there.

Reference:

Freedman, R. A., Geller, R. M., and Kaufmann, W. J. 2008, Universe (9th Ed.; New York, NY: W. H. Freeman and Company)

User Avatar

Wiki User

โˆ™ 2010-10-08 02:29:00
This answer is:
User Avatar
Study guides

Astronomy

20 cards

How long does it take for the solar system to make one orbit around the Milky Way galactic center

What layer of the sun moves heat from the radiative layer to the photosphere

Which of these determines the intensity of a volcano

During earthquakes which type of fault results when one plate is compressed up onto another plate

โžก๏ธ
See all cards
4.22
โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…โ˜†โ˜…
37 Reviews

Add your answer:

Earn +20 pts
Q: Why are the inner planets so different in composition from the outer ones?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Why are inner planets different than outer planets?

Inner planets. are inner & outer planets. are outer


What is the composition of the inner and outer planets?

inner planets are made up of rocks and outer planets are made up of gases


How do the inner and outer planets atmosphere different?

the outer planets are gaseous and the inner planets are not


Are all planets alike?

sorta there are inner and outer planets the inner planets are alike and outer planets are alike to but inner and outer planets are different.


What are two major differences in the composition of the inner and outer planets?

the inner planets are rocky and warm and the outer planets are made out of gas and is cold


How are the inner planets and the outer planets different?

The inner planets are closer to the center, and the outer planets are farther from the center.


What divides planets into inner planets and outer planets?

Mostly their composition. Inner planets are made of heavy solid materials. Outer planets are made of lighter elements, primarily gases. Also, there is the Asteroid Belt, which is between the inner and outer planets.


Explain how the inner planets are different from the outer planets?

Inner planets small and rocky. Outer planets big and gassy.


How are the inner planet and outer different?

The inner planets are solid rock and the outer planets are gas.


How are the inner and outer planets different?

The inner planets are all rocky planets. The outer planets are completely made up of gases. The inner planets are much smaller than the outer planets.


How are inner planets different from the outer planets?

The inner planets are like big rocks. The outer planets are like big balls of gas.


How are the inner planets different than then outer planets?

The inner planets are hotter because they are the closest to the sun the outer planets are the coldest because they are the farthest planets from the sun

People also asked