Coronas can be easily distinguished from 22? halos because:
A) they do not have clearly identifiable rings.
B) they only occur when it is raining.
C) the color sequence is reversed, with the bluish-white color on the inside.
D) they never occur around the moon.
C
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Recycled tantalum accounts for approximately ________ of its availability for use in manufacturing.
Fill in the blank(s) with the appropriate word(s)
What is the "greenhouse gas" that is the most significant cause of what scientists have labeled global warming?
a. nitrogen dioxide b. hydrogen peroxide c. ferrous oxide d. carbon dioxide
Oxygenated blood is found in the
A) right ventricle and right atrium. B) left ventricle and left atrium. C) right atrium and pulmonary veins. D) left atrium and pulmonary arteries.
The main ingredients in photochemical smog are
A) ozone, PAN, and nitric acid. B) PAN, nitric acid, and carbon monoxide. C) ozone, particulate matter, and carbon monoxide. D) PAN, carbon monoxide, and particulate matter.