Answer:
d) Chemical composition of its outer regions
Explanation:
Spectroscopy is the study of spectral lines, it's an important part of studying the chemistry that goes on in stars and interstellar clouds, spectral lines can give relevant information because every atom or molecule gives off light at a specific frequency, thus, astronomers can look for gas containing a particular atom or molecule by tuning the telescope to one of the gas's characteristic frequencies. Therefore, we can know the chemical composition or a star's outer regions analyzing the spectral lines.
Even though the spectral shape of a blackbody continuum depends on the temperature of the object an there's a relationship between an object’s temperature and the peak of its spectrum, we don't consider this answer as correct because we are not measuring spectral lines but the continuum.
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Answer:
Explanation:
Our teachers have always said- Our Sun is a giant star, there aren't much similarities of those two but, We can say is that There are still stars out there that are much like the Sun, we named the Sun it's name because planets orbit around the Sun and there are still Stars out there that have an orbit around it.
Answer:
D. historical geology involves the study of rock strata, fossils, and geologic events, utilizing the geologic time scale as a reference; physical geology includes the study of how rocks form and of how erosion shapes the land surface
Explanation:
The geology can be separated into two sub-disciplines; physical geology and historical geology. The physical geology is the part of geology that has the present in its focus. It is examining the formation of the rocks, the volcanic eruptions, the earthquake activities, and even the effects of the pollution. On the other side, the historical geology is focused on the past. This part of the geology uses the geological time scale as its reference. It is examining the layers of the rocks, and through it tries to explain what happened in the past, how were the geological processes working. Also, the fossils are one of the main focuses because they provide lot of information about the environment in which they lived.
Answer:
D. divergent oceanic-oceanic boundary
Explanation:
- The oceanic and oceanic divergent plate boundary is a plate boundary were in the two oceanic plates moves away from each other and is an example of the mid-oceanic ridges in the mid-Atlantic ocean,
- Due to the cooling of the magmas on both the sides and the spreading of the seafloor as a result of this. This zone is the place of the construction of the new sea surface and does not show volcanism.
