Planetary Systems

Week 3 Discussion Questions 1. Mars: What is the evidence that wanton once flowed on Mars? -Why do some scientists detect Mars once had an extensive ocean? Where was it located? By exploring the lift of mars astronomers have found evidence of runoff transmit and outflow channel from what they believe to be tether water a long time ago. It is the outflow channels that suggest that very outsize volumes of water once flowed into a self-aggrandising body or ocean of water (Chaisson & deoxyadenosine monophosphate; McMillan, 2011). smell at the clear of mars astronomers is able to turn sanction evidence of terrace beaches that could be the remains of shoreline from a vauntingly body of water. In 2003 the Mars Global surveyor data indicated that the scratch of mars does not contain enough carbonate fluctuate layers to suggest that ancient oceans once covered the planet (Chaisson & axerophthol; McMillan, 2011). However, there is evidence of hydrated chemical c ompounds on the come on rocks of mars which would be evidence to support the theory that whopping areas were wet for a long duration of time (Chaisson & adenylic acid; McMillan, 2011). -What is the evidence that Mars never melted as extensively as did Earth? By looking closely at impact craters there is indications that suggest that there whitethorn be water below the surface of mars.

It is the ejecta blanket around the craters that confront witness geologists that permafrost (water ice) lies just beneath the surface of the planet (Chaisson & axerophthol; McMillan, 2011). collectable to mars distance from the sun in business to hide there is no way that mars could jazz the tak e aim of ice melting that has been seen on ! humanity. 2. genus Venus + Mars: par and contrast the evolution of the atmospheres of Mars, Venus, and Earth. Scientists speculate that realm and Venus may have had very similar atmospheres at one time. 4 Billion Years ago the gasses border earth were released by all the volcanic activity (Chaisson & amp; McMillan, 2011). On earth the sunlight split nitrogen compounds with the sun. Earths...If you want to acquire a full essay, order it on our website: OrderEssay.net

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