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Earth and Mars are both terrestrial planets. Both planets have about the same amount of dry land surface areas. Mars, like Earth, has volcanoes, canyons, and impact craters.

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Who are earths neighbors?

Mars and Venus and the moon.


How strong is mars gravity compared to earths?

The acceleration of gravity on the surface of Mars is 3.722 m/s2 .That's about 38 percent of its value on Earth.


What are two factors that affect mars seasons?

Orbital distance from the Sun. Axial tilt with respect to the Plane of the Ecliptic.


Scientists hypothesize that life may have existed once on what planets?

Yes, demonstrably the planet Earth has life. Scientists are currently looking for life on Mars (no proof of life recognized there yet) and are speculation that some extrasolar planets may be in the Goldilocks zone for life.


What do scientists believe can be found on mars rhat is also found on Earth?

Planetary scientists have a lot about Mars over the past 40 or so years of robotic exploration. The earliest probes discovered Mars is heavily cratered in the southern latitudes, as much as the Moon, but the northern latitudes are much less cratered, such that scientists began to suspect an ancient ocean was responsible for resurfacing the northern parts, erasing signs of past impacts. By counting the number of craters in a given region, we can determine the relative ages of each terrain. Combining images and topographic data, scientists can trace ancient shorelines (multiple sea levels, as the seas dried up or evaporated). Observations of the south pole revealed a frozen carbon dioxide ice cap with seasonal variations that contain a historical record of the Mars atmosphere. Mars has been and is thought to still be volcanically active. Volcanoes are present, of the kind that created Yellowstone or Hawaii on Earth; tectonism without plate tectonics. Traces of methane in the atmosphere are replenished annually, suggesting either replenishment by volcanoes or life forms. Geomorphological and structural observations show that water flowed across the Martian surface. We can have estimates of the size and composition of the core of Mars, and magnetic data showing local magnetism but no global magnetic field. Water ice has been found just below the surface in the northern hemisphere. We have some mineral maps, and radar images of the subsurface layering. In short, a lot of scientific data has been found, and piecing all that together to determine that past geological history of Mars is an ongoing endeavour.