Answer: It is Molten Rock.
Explanation:
The rivers will go both north and sounth
Answer:
Iron oxides appeared after the emergence of cyanobacteria.
Explanation:
The composition of Earth's atmosphere in the first couple of billions of years of its existence was nothing like the atmosphere of today. This had a big influence on the processes that were taking place, or rather what processes and to what extent could have happened in those conditions. One big difference between the atmosphere then and after is the levels of oxygen.
Until the appearance of cyanobacteria, the oxygen levels in Earth's atmosphere were very low, and the same goes for the oceans. With a lack of oxygen, the process of oxidation was absent as well. The cyanobacteria though managed to produce oxygen, and this was on such a high scale that they changed the composition of Earth's atmosphere and the oceans. Not just that this enabled complex lifeforms to develop, but it also enabled the process of oxidation. Iron oxides for example occurred only after cyanobacteria appeared, and this can easily be seen when dating the oldest iron oxides and compare that age with the appearance of cyanobacteria.
When to talk about the plate tectonic it sound the same as our continents as we see in the ancient days you were having two continents which is laurasia and Gondwanaland
<u>Answer:</u>
The geography of the Americas and Oceania contributed to their unique development by providing them with the most favorable climatic conditions and abundance of valuable natural resources.
<u>Explanation:</u>
- The geography of the Americas and Oceania has been blessed with possibly the most diverse features than any other continents in the world.
- The Americas are surrounded by oceans on all the sides and so is Oceania.
- The availability of valuable natural resources in the Americas and Oceania has allowed the regions to prosper at a great pace.
- Land-forms favorable for various occupations, the existence of perennial water resources and various other factors like these have contributed to the unique development of the continents.
