The iron in banded iron formations is found in this form:a
iron sulfides d. iron carbonates
b. iron oxides e. none of the above
c. iron silicates
B
You might also like to view...
The half-life of radioactive parent isotope Q is 1000 million years. Scientists testing a rock sample discover that the sample contains three times as many daughter isotopes as parent isotopes. What is the age of the rock?
- 1,000 million years
- 2,000 million years
- 3,000 million years
- 4,000 million years
What was the cause of flooding in the 1993 upper Mississippi River flood?
A) Heavy snowmelt in Canada sent large volumes of water down the river in the spring. B) A dam failed because it had been built in a risky place near a fault. C) Persistent thunderstorms caused large amounts of rainfall over a several-state region. D) Winter produced rain that melted snow that was on the ground.
RNA and DNA differ in all of the following except:
A) RNA is single-stranded rather than double-stranded. B) RNA uses a different sugar from DNA. C) RNA uses a completely different set of nitrogenous bases compared to DNA. D) RNA uses the nitrogenous base uracil (U) in place of thymine (T).
Which of the choices below is a diagnostic characteristic of a mineral?
a. Minerals lack a repetitive geometric structure. b. Minerals may occur naturally or may be synthetically made. c. Minerals only occur as solids. d. Each mineral has a defining chemical composition with no possibility for variation or the substitution of elements. e. Minerals are only made of organic material from living organisms.