Match the igneous composition to its silica content
A) ~60%
B) ~50%
C) ~70%
1) Mafic
2) Felsic
3) Intermediate
Answers: 1) B 2) C 3) A
You might also like to view...
Earthquakes below Kilauea volcano are dominantly deep events in the mantle.
Answer the following statement true (T) or false (F)
Assume that man's recorded history can be stretched back to 4600 years before the present. This is approximately what fraction of geologic time?
A) one hundred-thousandth B) one millionth C) one billionth D) one ten-thousandth
Which of the following best describes Earth's mantle?
A. metallic liquid B. pure carbon C. high-density rock D. low-density rock E. metallic solid
Which of the following is NOT a source of material for soil?
A. CO2 gas from roots B. leaves and other plant debris C. weathered rock and sediment D. water from precipitation and snowmelt E. All of these are a source of material in soil.