A "projection" is a way of displaying the 3-D Earth in a 2-D form <em>(C)</em> ... like on a piece of paper.
There are many different map projections. Each one has advantages and disadvantages. It's not possible to correctly reproduce all the details of a globe surface on a flat piece of paper. Something's gotta give.
FAD's and LAD's would differ if we focused on dinosaurs within a certain region because of migratory patterns. Similarly, focusing on species levels would decrease the available data.
FADs or First appearance datum is a term used by scientists to refer to the first appearance of a species. Like-wise, LAD is used to refer to the last appearance of a species in the record.
If we were to focus on dinosaurs within a certain region, the FAD's and LAD's may be quite different. This is due to the migratory patterns of certain dinosaurs. Perhaps a certain species has a much more distant FAD or LAD in one region than it does in another because that dinosaur may have taken many years to wander to another region of the Earth.
Like-wise, limiting our search to a species level can impact the LAD or FADs. The taxonomy hierarchy is as follows:
- species
- genus
- family
- order
- class
- phylum
increasing in scope, Domain is the level that holds the highest variety of organisms. In contrast, species is the most specific, so limiting our data to a single species level would greatly affect the LADs and FADs because it lowers the number of dinosaur species that we take into account.
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Rome was corrupted already by its large expanse. the it was the factor of the people. the peopl ewere not satisfied with what was going on like the persecutions. Another thing that was happing was the amoun tof terrible and unbenifactory leaders. Some such as Nero Destroyed parts of the empire. The last factor is Religion. When the Christians Came along, they pretty much indirectly destroyed Rome.
Answer: Two hydrogen nuclei come together to produce one helium nucleus and two protons, and energy is released.
Explanation:
All stars (including the Sun) at birth begin to fuse two hydrogen nuclei to form helium through nuclear fusion.
In this sense, nuclear fusion is the union of two light atoms, releasing energy in the process, which is the cause of the great luminosity of a star. Especifically, the hydrogen nuclei will begin to fuse, generating helium nuclei in the process and releasing huge amounts of energy.
To unerstand it better:
To shine, the stars transform their hydrogen into helium by means of nuclear fusion. When at half of its life a star is without hydrogen, the nucleus becomes entirely helium and the star declines, becoming colder and brighter due to the energy generated by the nuclear reactions, then the star begins to contract.
Nevertheless, if the star is bigger, this helium will be also consumed and the nucleus transformed in Carbon, then in Oxigen, and so on. Being the last transformation Iron until the star delivers all its energy.
