The crust of the Earth is covered by about ________ water in the hydrosphere
A) 50%
B) 60%
C) 70%
D) 80%
E) 90%
C
You might also like to view...
Radioactivity Basics: The isotope 
U is radioactive and decays in a series to 
Th. In this series, the particles ejected from the nucleus are
A. one alpha particle and three beta-minus particles. B. three alpha particles and one beta-minus particle. C. one alpha particle and four beta-minus particles. D. four alpha particle and one beta-minus particle. E. two alpha particles and two beta-minus particles.
Which answer below is not a statement of the second law of thermodynamics?
A. Real processes proceed in a preferred direction. B. Energy does not flow spontaneously by heat from a cold to a hot reservoir. C. The entropy of the universe increases in all natural processes. D. In theory, heat engines working in a cycle employ reversible processes. E. You cannot construct a heat engine, operating in a cycle that does nothing but take heat from a reservoir and perform an equal amount of work.
The weight of a 1.00 kg on the surface of the moon is 
R of the moon is 
m, mass of the moon is 
A. 9.80 N. B. 7.59 N. C. 1.62 N. D. 0.981 N. E. 0.548 N.
Radiation Doses: A person receives an absorbed dose of protons of 20 millirads. The RBE of protons is 5. What is this person's equivalent dose in rem?
A. 4 millirem B. 15 millirem C. 20 millirem D. 25 millirem E. 100 millirem