Caves like this one can be found all around Pennsylvania. Most caves are formed in a soft rock called
Rain
runs through cracks in the rock and causes chemical erosion. The process takes thousands of years. Eventually it
carves out tunnels and caves below Earth's surface.
granite
B)
limestone
sandstone
D)
shale

Explain how zollverein, a tariff agreement, to unite the german states.

Why have some historians rejected the labels bc and ad as laels for periods in world history

What were copernicus’s ideas about the order of the universe deemed to be dangerous to church thinking? (5 points) a.the church was invested in the idea that the earth was at the center of the universe b.copernicus was developing a new religion that would challenge the church c.the church feared his ideas threatened their control of european universities d.copernicus was a follower of luther and therefore could not be trusted