Actually there are a number of geological specialists who study Plate Tectonics: Geo-dynamicists, structural geologists, geophysicists (including seismologists - earthquake scientists), vulcanologists. I'm not sure there is one term for those who study plate movemennts through time though.
Answer:
See solution and explanation below
Explanation:
a) From;
N/No = (1/2)^t/t1/2
1/8 = (1/2)^t/1.25 * 10^9
(1/2)^3 = (1/2)^t/1.25 * 10^9
3 = t/1.25 * 10^9
t = 3 * 1.25 * 10^9
t = 3.75 * 10^9 years
b)
N/No = (1/2)^40,110/5,730
N/No = (1/2)^7
N/No = 1/128
percentage remaining after 40,110 years = 1/128 * 100 = 0.78%
c) N/200 * 10^-9 = (1/2)^4.26 * 10^9/0.710 * 10^9
N/200 * 10^-9 = (1/2)^6
N/200 * 10^-9 = 1/64
64 N = 200 * 10^-9
N= 3.125 * 10^-9 g
d) Radiocarbon dating can not be used to determine the age of the solar system since the solar system is as old as the universe and was formed billions of years ago. Radiocarbon dating can only be accurately used to obtain the age of objects of plant or animal origin between 1000 - 10000 years old.
Answer:
Stretching from Canada to Mexico, the
✔ Rockies
are the longest mountain range in the United States.
The Rio Grande, Missouri, and Mississippi are major
✔ rivers
in the United States.
The United States is bordered by the
✔ Atlantic Ocean
to its east.
Explanation:
1. B
2. C
3. B
Contacts between sedentary and nomad peoples<span> resulted in trade, tribute payments</span>