Author Question: During the first Phase of migration to the United States (1800-1820), where did the majority of ... (Read 150 times)

arivle123 · **on:** Jul 14, 2018

During the first Phase of migration to the United States (1800-1820), where did the majority of immigrants come from?

A) Ireland and Germany
B) Southern and Eastern Europe
C) Canada and Latin America
D) Latin America and Asia
E) England and Africa

Question 2

What processes contribute to increases in global sea level, and by how much has it gone up in the recent past?

What will be an ideal response?

huda · **Reply #1 on:** Jul 14, 2018

Answer to Question 1

E

Answer to Question 2

Sea level increases when ice on land melts and when seawater expands as it warms (thermal expansion). Thermal expansion has accounted for most of the observed 20-cm increase in sea level over the last 130 years. The land ice that is easiest to melt is that trapped in mountain glaciers. Fortunately, there is only about half a meter of equivalent sea level rise in such glaciers. The polar ice sheets contain much more water (6 m for Greenland, 70 m for Antarctica), but this will take much longer to melt.