Earth's inner core is liquid whereas its outer core is solid.
Answer the following statement true (T) or false (F)
False
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If an element has 10 protons, 11 neutrons, and 10 electrons, which expression correctly identifies the element?
A. sodium-20 B. neon-31 C. neon-21 D. sodium-11 E. neon-11
On a sunny day in winter when there is a large snowpack on the ground you notice it appears brighter outside than on a sunny day when there is no snow on the ground. What best explains this scenario?
A. Snow has a higher albedo than bare ground and reflects more solar radiation. B. The sun emits more solar radiation in the winter months. C. Snow emits more infrared radiation than bare ground. D. The sun emits more ultraviolet radiation in the winter months.
We should never assume that any aspect of culture has diffused unless we can demonstrate the path of diffusion from one culture to another
Indicate whether the statement is true or false.
In toxicology studies, LD50 can be best described as the dose ________
A) at which 50% of an exposed population develops a chronic effect from the toxicant B) at which 50% of an exposed population develops disease C) at which more than 50% of the population dies as a result of the toxicant development D) at which 50% of an exposed population is killed or displays a specific symptom E) at which at least 50% of the exposed population is not affected by the toxicant