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www.universetoday.com/22603/mars-compared-to-earth

Mars is the 4th planet from Sun, and the place that holds our imagination because of the possibility that there might be life there. There are some similarities to Earth, like its day length ...

www.space.com/1582-earth-mars.html

Mars is the most Earth-like other world known, yet the two planets are really a world apart and many mysteries remain. Here's what's known: Looks ruddy from outer space, due to being covered in ...

phoenix.lpl.arizona.edu/mars111.php

Mars is only about one-half the diameter of Earth, but both planets have roughly the same amount of dry land surface area. This is because over two-thirds of the Earth's surface is covered by oceans, whereas the present surface of Mars has no liquid water.

www.lpi.usra.edu/publications/slidesets/redplanet2/slide_1.html

1. Earth-Mars Comparison . This image compares Mars and Earth in their correct relative sizes. Mars (diameter 6790 kilometers) is only slightly more than half the size of Earth (diameter 12750 kilometers). Note the difference in color between the two planets.

sciencetrends.com/gravity-mars-vs-moon-vs-earth

What is the gravity on Mars? Just the same as the moon, Mars is smaller than the Earth, so, therefore, the gravity won’t be as much as it is on Earth. Finding the gravity on Mars is really the same as finding the gravity on Earth and the moon because you simply plug the information into the formula. What we need to plug in: Mass= 6.471 x 10^23

www.nasa.gov/pdf/546136main_ESS5_EarthvsMars_C3.pdf

Earth vs. Mars . LESSON DESCRIPTION . Remote satellite images of Earth and Mars are used to compare and contrast physical processes that occur on both planets. OBJECTIVES . Students will Identify similarities and differences between the physical processes that occur on Earth and Mars Classify images of Earth and Mars

sciencing.com/similarities-differences-mars-earth-8425570.html

Mars is nearly twice as large as the Moon and a little over half the size of Earth, according to the Center for Mars Exploration. The diameter of Mars is about 6,786 kilometers (4,217 miles), compared to that of Earth, which is about 12,756 kilometers (7,926 miles). In addition, Earth has a mass that is 10 times greater.

www.youtube.com/watch?v=tSU3pq22qkU

Will Mars or Venus Kill You First? | Space Time | PBS Digital Studios - Duration: 10:57. PBS Space Time 684,309 views

www.nasa.gov/vision/earth/environment/Sibling_Rivalry.html

Scientific understanding is often a matter of making the right comparisons. In terms of studying the Earth, one of the best comparative laboratories exists one planet over -- on Mars. In many ways, the study of Mars provides Earth-bound scientists with a control set as they look at the processes of ...