There is really nothing to know. All you have to use is context clues and common sense. We know some synonyms for direct are manage and handle. Indirect means not direct, right? And we can't handle or manage earth's interior (core), right? Therefore, the study of earth's interior is an example of indirect observation because we cannot directly manage it.
Answer:
D. Seafloor bedrock is younger near the ridge and older farther away.
Explanation:
In a divergence boundary oceanic plates or continental plates move apart. The plates moves apart causing an uprising of molten magma to form a new crust. The divergent movement of plate is very prevalent in the oceanic plates.
The plates in the oceanic crust moves apart due to the up welling of aesthenosphere materials . These aesthenosphere materials(molten magma) are introduce to the ocean floor through the mid oceanic ridge . As this materials are introduced through cracks and fissures, the plates continue to drift apart. The molten magma later solidified to form a new crust closer to the oceanic ridge. This is why sea floor bedrock closer to the ridge is younger as new rocks are formed here. But as one move farther away from the ridge the rocks become older. This phenomenon provide ample evidence that the seafloor is spreading. The older rocks found father away from the ridge proves the seafloor has been spreading given way for new rocks closer to the ridge.
C) 30 miles is the correct answer
(I’m not sure but I think so)
According to the graph, we can see the total fertility rates that can be compared to the population growth rates, as shown in option C. Thus, option C is the correct answer.
We can arrive at this answer because:
- The chart analyzes the NIR of the regions.
- The NIR is related to the percentage of growth that a population achieved during one year.
- The chart analyzes this value, associating it with the natural growth of these regions.
- This natural growth shows how much the population of a country has grown, without considering the migration that takes place in a country, that is, without considering the people who have moved between regions of the country.
In this case, we know that the graph considers population growth taking into account the birth rate and therefore considering the fertility rate, in one year.
More information:
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