Atmosphere, EarlyTopic, HotWiechert UH (2002) Earth’s early atmosphere. Science 298:2341–2342Kasting JF (1993) Earth's early atmosphere. Science 259: 920–926Wiechert U. (2002) Earth's early atmosphere. Science 298, 2341 - 2342.U.H. Wiechert, Earth's early atmosphere, Science 298 (...
Scientists believe that the early Earth's atmosphere was different from today's. Which of the following gases was probably not present in large amounts in the early Earth's atmosphere? A. Carbon dioxide B. Methane C. Oxygen D. Ammonia 相关知识点: ...
Ideas about atmospheric composition and climate on the early Earth have evolved considerably over the last 30 years, but many uncertainties still remain. It is generally agreed that the atmosphere contained little or no free oxygen initially and that oxygen concentrations increased markedly near 2.0 bi...
Ideas about atmospheric composition and climate on the early Earth have evolved considerably over the last 30 years, but many uncertainties still remain. I... J.F. Kasting - 《Science》 被引量: 1438发表: 1993年 Earth's early atmosphere. (cover story) Examines the formation of the Earth's...
Life and the Evolution of Earth9s Atmosphere Harvesting light to produce energy and oxygen (photosynthesis) is the signature of all land plants. This ability was co-opted from a precocious and ancient form of life known as cyanobacteria. Today these bacteria, as well as microscopic... JF Kast...
Iron-containing rocks reportedly recovered from period strata contain no rust, further indicating the absence of oxygen. Consequently, the earth was very hot, evaporating the liquid water into the atmosphere. However, as the earth cooled, gravity-trapped water vapor condensed, fell as rain, and di...
The early Earth was an extreme environment compared to the present day Earth: oceans with probably higher salinity and lower Ph, evaporitic conditions in the littoral environment, temperatures 70-80°C, little or no Oin the atmosphere, pervasive volcanism and hydrothermal activity, and peak bolide...
The history of the Earth has been marked by major ecological transitions, driven by metabolic innovation, that radically reshaped the composition of the oceans and atmosphere. The nature and magnitude of the earliest transitions, hundreds of million year
Geologist Don Lowe has estimated that before 3 billion years ago, less than 5 percent of Earth's surface was land. Earth's atmosphere was also very different from that of today. There was no oxygen, and there was a great d.1 more carbon dioxide (Co2)—perhaps 100 to 1,000 times as...
The possibility of a resultant variation in the surface temperatures of the planets is of particular interest for the Earth, which is the only planet at present possessing a considerable quantity of water in the liquid state on its surface....