Joellen Zorrilla: Mercury is the closest planet to the Sun and has been known since the ancient times. It has an iron core with a rocky mantle which is covered with craters. Mercury has no moons and an atmosphere that is so thin it barely even exists. It is 57.9 million kilometers away from the Sun and has a diameter of 4880 kilometers. The length of a year on Mercury is only 88 earth days, however a day is equal to 176 earth days. Mercury holds an average temperature of 167°C. Venus is the second planet from the Sun and because it shines brightest in the night sky, it has been recognised since ancient times. This planet is made of rock has a surface dotted with volcanoes and craters. Venus has no moons but unlike Mercury, it has an atmosphere. Venus’s atmosphere is 15 times more dense than Earth’s which makes it the hottest planet in our solar system. The thick clouds of carbon dioxide trap the heat in a kind of greenhouse effect. A year on Venus is equal to 224.65 ! Earth days and a day is equal to 24...Show more
Derrick Kloke: It's simple: you reference everything you learned or are using from the source.For example if it says apples cause cancer, you have to reference where you obtained that piece of information from. In short, when in doubt, reference/cite! Anything you have learned or are using from an article, journal etc that is not your own opinion should be referenced/cited.
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