<span>Extrusive Igneous Rocks. Extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly. Most extrusive (volcanic) rocks have small crystals. Examples include basalt,rhyolite, andesite, and obsidian.</span>
The Volga River
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1.A
2.D
3.B
4.A
5.D
6.B
7.A D
8. A
9.A
10.D
11.D
12.A
13.D
14.A
15.A
16.D
17.A
18.A
19.B
20.C
A Mexican rebel who attacked and burned a town in New Mexico.
Theodore Roosevelt was an imperialist and supported it because he was interested in the US maintaining its power for racial reasons. He believed that the white race was the most dominant over everyone else.
