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Answer: C) stars in these regions are hidden by interstellar dust grains.</h2>
Explanation:
Some areas of the Milky Way seem dark because those are areas of the galaxy that are hidden by huge columns of interstellar dust that we cannot see through the visible range of the electromagnetic spectrum (which is the range in which our eyes see).
However, to solve this problem, astronomers use telescopes that work in the range of infrared and radio waves, to observe a little more through this intersetelar dust.
Of Australia and New Zealand
<span><span> V = d/ t
</span><span> t = v/d
-> 2.00 * 10 ^ 10 s
divide by 3600 and by 24 to get days
->232414 days
divide by no of days in a year
giving 636 years approx. </span></span>
Answer and Explanation:
1. Sub-Saharan Africa has a very strong economic dependency, which means that its population has less access to education and resources. The limitation of resources prevents the population from having full access to contraceptive methods that can limit the exacerbated growth of the population that did not have a structure that shelters it efficiently. In addition, deprivation of sex education has prevented families from learning concepts about contraceptive methods, family planning, among others that promote rational population growth. This all contributes to Sub-Saharan Africa's population growth, which is increasingly disproportionate and growing, compared to the rest of the world.
2. The two groups differ in their projections of population growth, because they make analyzes using different factors, at different intensities. This is because the projection of population growth is a subjunctive factor, which has countless variables and can have different analyzes and interpretations.
It is expected that seafloor samples taken farther from land usually contain a greater proportion of biogenous sediments because sediments are thinnest on the seabed closest to spreading centres (young seafloor) and thicker distant from the ridge (older seafloor with more time for accumulation). Additionally, sediments are substantially thicker close to continents.
More about seafloor sediments:
Terrigenous, pelagic, and hydrogenous sediment are the three different types of sea floor sediment. Terrigenous sediment is deposited on the continental shelf, continental rise, and abyssal plain and is derived from the land.
Clay particles and tiny marine animal skeletons that progressively sink to the ocean floor make up pelagic sediment. Minerals that precipitate from seawater on the ocean floor, such as manganese nodules, are abundant in hydrogenous sediments.
Learn more about sediments here:
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