Final Exam
Planets and moons in our solar system have many differences, such as geologic activity, composition, interior structure, magnetic field, and atmospheres. To start off, there are two different groups of planets in our solar system, terrestrial and jovian planets. The terrestrial planets are Mercury, Venus, Earth and Mars. Terrestrial planets are mostly composed of silicate rocks or metals.The terrestrial planets are the planets closest to the sun. Terrestrial planets are composed of mostly hydrogen, helium, and water, which exist in different states. These planets have a solid planetary surface. The densities of these planets are between 3.9 and 5.4 gxcm^-3.
Earth’s rotation is 24 hours, Mercury’s is 59 days, Venus’ is 243 days and
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Because of this, Mercury cannot support life. Venus’ atmosphere is thick and toxic carbon monoxide atmosphere that keeps heat in, making it the hottest planet. Earth’s atmosphere contains water vapor, but the climate is changing and warming up. Mars’ has a similar atmosphere and magnetic field to Earth. The Jovian planets are Jupiter,
Saturn, Uranus and Neptune. Jovian planets are composed of gases or ices. Jupiter and Saturn are also called gas giants. They consist of hydrogen and helium mostly. They are rocky and are metallic with very hot cores. Uranus and Neptune are called Ice Giants and they have an atmosphere full of hydrogen. Their blueish colors come from the methane in their atmospheres and both have magnetic fields. Life cannot be supported on any of these planets.
In our solar system there are many moons. Mercury and Venus have no moons. Earth has one named Luna which can be seen from Earth. Mars has two moons, Deimos and Phobos.
Jupiter has 67 moons, Saturn has 62, Uranus has 27, and Neptune has 14.
I think some benefits to our world studying other worlds is knowing what our