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Mercury, Venus, Earth, Mars.

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-Mercury is the smallest terrestrial planet and the planet that is closest to the sun.

-Mercury is not much larger than the earths moon and has no moons of its own.

-The interior of Mercury is probably made up of the dense metal iron.

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-Has liquid water at its surface, 70 percent is covered

with water.

-20 percent of the atmosphere is oxygen and the rest

is mostly nitrogen with small amounts of other

gases such as argon.

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-They are small with dense and rocky surfaces.

-Planets closest to the sun.

-They include Earth, Mercury, Venus, and Mars.

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-Has liquid water at its surface, 70 percent is covered in water.

-20 percent of the atmosphere is oxygen, nearly all the rest

is nitrogen with small amounts of other gases like argon.

- Only planet whose English name does not derive from Greek/Roman

mythology

-Unlike the other terrestrial planets, Earth's crust is divided into

several smaller plates  which float around independently on

top of the hot mantle below.

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-They are small and dense with rocky surfaces.

-They include Earth, Mercury, Venus, and Mars.

-Planets closest to the sun.

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-Saturn is the second largest gas giant

-The outer atmosphere of Saturn contains 96.3% molecular hydrogen and 3.25% helium

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California Physical Science Book

http://nineplanets.org/earth.html

http://www.nvcc.edu/loudoun/humdiv/comdesign/Web-2012/Eric%20SturdevantSU11/esturdevant/inner_planets.html

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-Jupiter is the largest and most massive planet

-Like all of the gas giants, Jupiter has a thick atmosphere made up mainly of hydrogen and helium

-Astronomers think that Jupiter may have a dense core of rock and iron

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-Pluto is very different from the gas giants.

-Pluto has a solid surface and its much smaller and denser than the outer planets.

-In fact, Pluto is smaller than the earths moon.

-Pluto is probably a mixture of rock and ice.

-The diameter of Pluto is only 2360 kilometers compared to earths 12,742 kilometers

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- Sometimes called "Earth's twin" because they are both similar in size and mass.

-Its density and internal structure is similar to Earth's.

-Takes about 8 months for Venus to rotate once on its axis, rotates from east to west.

-Atmosphere is so thick that it's always cloudy there, 90 times greater pressure

than Earth's atmosphere. Surface temp. is hot enough to melt lead at 460 degrees C.

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-Neptune is even farther from the sun than Uranus.

-In some ways the planets look like twins. They are similar in size and color.

-Neptune is a cold, blue planet. Its atmosphere contains visible clouds.

-Scientists think that neptune is slowly shrinking, causing its interior to heat up.

-As the energy rises towards Neptunes surface, it produces clouds and storms in the planets atmosphere.

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-It is the smallest terrestrial planet and is the closest to the sun.

-Has many flat plains and craters and virtually has no atmosphere.

-Has a greater temperature range than any other planet.

-During the day it reaches temperatures of 430 degrees C and at

night its heat escapes into space and reaches

temperatures below -170 degrees C.

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-Mars is often called the red planet because of its reddish color

-Scientist believe that a large amount of water flowed on Mars surface in the distance past

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-The diameter of Uranus is about four times the size of earth's diameter, it is still a much smaller than jupiter and saturn.

-Uranus is twice as far from the sun as saturn, so it is much colder.

-Uranus looks blue - green because of its traces of methane in its atmosphere.

-Like the other gas giants, Uranus is surrounded by a group of thin, flat rings, although they are much darker than Saturn's rings.

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-The four outer planets, Jupiter, Saturn, Uranus, and Neptune, are much larger and more massive than Earth

-The four outer planets are often called gas giants (gas planets)

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-Has liquid water at its surface (about 70 percent is covered

with water).

-Only atmosphere that is rich in oxygen.

-Has three main layers: crust, mantle, and core.

-Only planet whose English name does not come

from Greek/Roman mythology.

-Unlike the other terrestrials, its crust is divided into several

separate solid plates which float around independently on top

of the hot mantle below, aka plate tectonics.

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-The inner planets are also known as the terrestrial planets.

-They are small and dense with rocky surfaces and include

Earth, Mercury, Venus, and Mars.

-Three of the four (Venus, Earth, and Mars) have atmospheres

that generate weather.

-They are the planets closest to the sun.