Characteristics ofThe four inner planets areMercury, no moons, an interior of mainly dense iron, virtuallyno atmosphere, huge ranges, flat plans, has a hot surfacetemperaturesVenues, is called earths twin, rotates opposite of most otherplanets from east to west, thick atmosphere, mostly of carbondioxide, surrounded by clouds of sulfuric acid, has. The hottestsurface temperature of any planetEarth has 3 layers, a solid rocky crust, a hot molten mantle,dens core of iron and Nickle, is the only planet with liquid waterat its surface, has an atmosphere that contains many differentgases, is the only planet with an atmosphere rich in oxygen,spins the fastestMars sometimes called the red planet, an atmosphere that ismostly carbon dioxide with few clouds, surface features thatappear to have been created by streams, lakes, or floods, takes88 days to go around sun, seasons like earth, big canyons andsome giant inactive volcanoesThey are smallThey are rockyThey are denseThey have few moons
