The best explanation for the cause of atmospheric pressure is:
A) air temperature.
B) weight of the air above.
C) wind force.
D) air density.
E) air compression.
Question 2
Several million Irish and Germans migrated in the 1840s primarily because
A) of the Black Plague.
B) of disastrous economic conditions brought on by government policy and displacement by the Industrial Revolution.
C) of poor environmental conditions including massive flooding.
D) of religious freedom.
E) Russian imperial advances threatened their livelihoods.