1) The surface of Venus is 900 ∘F, or 480 ∘C, which is due to the Greenhouse Effect. On Venus's surface, signs of chemical weathering are apparent. There used to be water on Venus's surface but because water is less dense than carbon dioxide, the water floated above it. It was then split into hydrogen and oxygen by the UV radiation. There are two large plateaus on Venus. Aphrodite Terra is about half the size of Africa. The other, Ishtar Terra, is about the size of Australia. Scientists, using satellites, have taken pictures of volcanoes and have found evidence of the beginnings of plate tectonics on the surface of Venus. About ninety-six percent of the atmosphere on Venus is composed of carbon dioxide. Along with the carbon dioxide, other chemicals exist. The most prominent of these is sulfuric acid. The atmosphere is believed to have formed from the outgassing of volcanoes. It is about one hundred times more dense that earth's atmosphere. Scientists have discovered so much about Venus because spacecrafts and satellites have been sent to study Venus. In 1970, the Russians sent an unmanned space craft to examine the surface of the planet. The craft was named Venera 7. Venus? atmosphere was so corrosive, that it destroyed this spacecraft. Along with Venera 7, there was one other craft that traveled to Venus. This was the Magellan and it gathered valuable information.
1) Venus has approximately the same mass, diameter, density, and surface gravity as the Earth. The atmosphere has no water and is so corrosive that it is virtually uninhabitable. On Earth, the greenhouse effect is occurring. Each day, this effect increases our surface temperature and traps carbon dioxide. Eventually, this will make Earth uninhabitable, too.
2) Chemical differentiation is how chemicals react to different stimuli. In the case of the inner planets, it is how iron reacts to heat.