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As compared to corse-grained igneous rocks, all fine-grained igneous rock _______.
A cool and solidify more quick
B. cool and solidify more slowly
What is the techtonic plates?
oceanic crust, lithosphere, continential crust
What is obsidian?
a volcanic glass
b. concodial fracture
c. all the above
Why are there so much iron in the core?
because its the heaviest and densest element.
What are the 9 most common elements?
Why are silicate rocks the most common on Earth?
A. the most common mineral are silicates
b. fe, o, silicon, mg, make up 92.1 percent of the earth
What is the Big Bang Theory?
all of the universe condense into one point and exploded
What is geographic north?
axis the earth spins
Magnetic north. Define
angle between magnetic north to geo. north
Magnetic inclination. define
angle made with the horizontal by the compass needle of a vertically held compass.
air bubble in rocks