Following are the techniques or methods or approaches we can say that were used by the scientists to determine the geologic age:
1. Relative age dating
2. Absolute age dating.
3. Radiation measurement.
4. Stratigraphic superposition.
5. The fossil record.
The scientists used the method of relative dating to divide Earth's past in different chunks of time when alike organisms were on Earth. After that, to discover the actual number of years ago that events occurred, the scientists used the method of absolute dating.
True. This is why cliffs change or older buildings are scuffed up. Not because of vandalism or animals it’s because small particles slowly erode away the surface.
Answer:
B. distance of the deposit from the source.
Explanation:
The grain size of sedimentary deposit can indicate the distance of the deposit from the source. This is because, when sediment is transported by water, the sediment becomes victim of abrasion. As abrasion occurs, the edges of the grains of deposit are reduced, eventually leading to a rounder shape. However, this process can vary based on the distance of the deposit, the method of transportation and the energy characteristics of the transportation medium.
In general, the borders of the federal state of Washington are in accordance to natural physical features.
The border with Canada,, the northern one, is defined by the Okanogan Range and the Kettle Range, two highlands.
The border with Oregon, the southern one, is defined mostly with the Columbia River, and partially by the Blue Mountains.
The border with Idaho, the eastern one, is defined with the edge of the lowland part of the Columbia River Basin.
While the western border is a border with the open water of the Pacific Ocean.
The correct answer is A. The country's population is aging.
