There are many ways to determine the value of currency. One is supply and demand, the more a currency is wanted the value of it will rise. However, if one value rises, the others fall compared to it. That's why currency values change all the time.
Ground-based telescope can not detect planet in the brightness of stars
This is very... open ended. Do you have some choices? If not, I will say that they would most likely be interested in Alaska and eastern Siberia being connected by ice. People could, at one point, simply walk across.
You will find intermediate and felsic magma involved in the construction of a shield volcano. Intermediate magma is found in the middle of the volcano and felsic magma is found near the top of the volcano.
The first coordinate "29°N 98°W" is located in the following:
City: Falls City
Country: United States
Continent: North America
An for the second coordinate "19°N 99°W:"
City: Tlalnepantla
Country: Mexico
Continent: North America
A. The U.S.-Mexico border.
B. You left Texas and are now in the Federal District of Mexico.
C. It is next to Mexico City, which is both politically and economically the most important city in Mexico.
D. The Sierra Madre del Sur Mountain Range