Why does hematite cause the rusty red color observed in many surface rocks?
A) Hematite is a carbon-oxide, giving rocks the red color (even if in small amounts).
B) Hematite contains pyrite, giving rocks the red color (even if in small amounts).
C) Hematite is an iron-oxide, giving rocks the red color (even if in small amounts).
D) Carbonic acid weathers hematite, giving rocks the red color (even if in small amounts).
Question 2
Why is carbonic acid the most abundant acid in chemical weathering?
A) Carbon dioxide is present in the atmosphere and in soil; it combines with water vapor in the atmosphere and water percolating through soil to produce weak carbonic acid.
B) Carbon dioxide easily breaks down to carbonic acid.
C) Carbonic acid is so good at chemical weathering that it appears all the time.
D) Acetic acid is rare, so carbonic acid is common.
Animals and plants of the intertidal zone adhering to their rocky surface.
Surface Features on Titan
Receptive Fields of Color-Sensitive Ganglion Cells
A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30 relative ...
Examples of Surface Barriers
A three-gene additive model for wheat kernel color