Mica Is Present in

Q6: The most common volcanic rock is<br>A) pumice.<br>B)

Q10: The earth's crust<br>A) has an approximately constant

Q12: Each step of 1 on the Richter

Q18: Earthquakes are least likely to occur<br>A) in

Q26: A general characteristic of igneous rocks is<br>A)

Q42: Volcanic gases do not include<br>A) hydrogen.<br>B) carbon

Q43: Most crustal rocks<br>A)were formed from compacted sediments.<br>B)were

Q46: Rivers produce which one or more of

Q48: Which one or more of the following

Q49: Most earthquakes are caused by shifts of