When scientists discuss the great oxygenation event, they are referring to a time when the transition from the mildly reducing Archean atmosphere-ocean system to the oxygenated atmosphere and shallow oceans of the early Paleoproterozoic that started between ~2.4 and 2.3 Ga and ended between 2.1 and 2.0 Ga.
- here The Great Oxidation Event, also called the Great Oxygenation Event, the Oxygen Catastrophe, the Oxygen Revolution, and the Oxygen Crisis, was a time interval when the Earth's atmosphere and the shallow ocean first experienced a rise in the amount of oxygen.
- in this event Gradually, the accumulated oxygen started escaping into the atmosphere, where it reacted with methane. As more oxygen escaped, methane was eventually displaced, and oxygen became a major component of the atmosphere.
- The Great Oxygenation Event (GOE) was the creation of free oxygen in our atmosphere. It was caused by cyanobacteria doing photosynthesis
to know more about photosynthesis click here
brainly.com/question/26494694
#SPJ4
The answer is TRUE
during the late 1800s there was an influx of chinese immigrants to the united states due to the gold rush
they were actually the first racial group to be targeted by law (chinese exclusion act)
Answer:
Option (A)
Explanation:
The cretaceous period formed the last period of the Mesozoic era, marked by the occurrence of some distinct major events, and it began about 145 million years ago and ended by about 65 million years ago. The name Cretaceous is actually derived from the Latin word 'Creta' which means “chalk”. Chalk usually refers to the white colored, soft, powdery limestone rock that is primarily comprised of fossil shells. These are basically dominated by the calcite minerals.
By the end of this period, the dinosaurs were completely wiped out from the earth and the flowering plants started to evolve after the mass extinction event, which is commonly known as the Cretaceous-Tertiary boundary (K-T boundary).
Thus, the name Cretaceous was given because during this time period, there was abundant deposition of marine limestones (chalk), depicting that the sea level was comparatively higher than the present day.
Hence, the correct answer is option (A).
Answer:
Below
Explanation:
Harappa is a village in Paristan where of course it will be hot. But, that is not it, because Harappa is a modern village living near the Ravi river. And near that is a civilization. So it is an ancient cite!(Very beautiful)
When visiting Mohenjo Daro, it will be hot as well. But just like Harappa, Mohenjo Daro was one of the most advanced civilizations of its time. So visiting would be a real treat. To see everything there would be a great thing to do, if learning about civilization was your thing.
Back and Forth Movements loosens sediment and rock
