How many satellites are in the GPS system?
24
15
1
29

From the standpoint of geography,a is an internal rendering of an individual's known world

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

The picture above depicts the berlin wall which divided in half from the 1960 to 1989 which type of boundary was the berlin wall