Sample essay topic, essay writing: Mercury - 492 words

As you may already know Mercury is the first planet. Which makes it the closest to the sun. It is 57,900,000km (36,000,000mi.) Because Mercury is so close to the sun it hasextreme temperature differences. Mercury's surfacetemperatures range from -180*C to 450*C (-290*F to 840*F). Temperatures that hot can melt iron, and other metals. Thedramatic temperature difference on Mercury are not onlybecause it is so close to the sun but, also by Mercury's surfacefeatures. The places that are the coldest on Mercury and atthe bottom of the craters and basins.

The hottest are theplaces closest to the sun. The temperature of the side that isfarthest away from the sun is allot warmer than scientiststhought it would be. Not a whole side but parts of Mercury havenever been in sunlight before. This is why scientists thought itwould be colder than it really was. Mercury's surface is much like the moon, they are verycolse to being the same size. It has many craters, high multiplering basins, and many lava flows. They have their similarities anddifferences

Mercury's diameter is 4,900 miles wide. Mercury'slargest feature is the Caloris Basin. The Caloris basin is 1,300 Km(800 MI). in diameter. The Caloris Basins floor is full of cliffsand ridges.

As you progress to the bottom the cliffs and ledgesincrease in size. The Caloris Basin was created when it wasbombarded with meteorites. The Caloris basin was created by ameteorite that could of been up to 100 km. When the largemeteorite hit Mercury it sent shocks through it which producedjumbled hills on the opposite side of Mercury. This process asknown as The Caloris Impact.

The lava flowed into craters andbasins which filled holes and cracks that smoothed out theirfloors. Like Earth, Mercury has 3 main layers. The Earth's beingthe crust, mantle, and core. Earth's core is made up of moltenrock AKA lava. Liquid cores create a magnetic field. Mercury'sthree layers are a rocky silicate crust, solid rocky silicate mantle, and a hot liquid iorn-nickle core.

The core makes up 75% of itsdiameter. Scientists did not think that is was possible for thecore to be liquid because over the years mercury's rotation hasslowed down dramatically. They thought that it would of beenhardened by now. Planets that have a magnetic field that aregenerated by the rotation of a conductive molten core such asthat of Earth and mercury are known as "The Dynamo Effect". Mercury's rotation period is 59 earth days long. That ishow long it takes it to rotate once on it's axis. It used to bemuch faster but over the years it has slowed dramatically.

Mercury's speed in orbit is 107,400 mph. Mercury got its namefrom a messenger if the Greek gods. He was very fast becausehe had wings on his feet. Mercury used to be the fastest planetin our solar system. Mercury's revolution period is 88 earth days. That is one year to them.

Mercury's mass is 0.055 (that ofEarth's), density is 5.44 grams per cubic cm. Mercury's atmosphere is 42% helium, 42% sodium, 15%oxygen, and 1% is of other gases. By:.

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