Easter Island is the current home to about 4,000 people; tourism is all but nonexistent on the island as there are only a few visitors each year
Indicate whether the statement is true or false
F
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Otto Hahn and Fritz Strassmann discovered fission by bombarding uranium with neutrons. Their discovery was made possible by finding one of the fission products, barium (Ba, atomic no. = 56). What is a reasonable explanation for why they were unable to initially observe the other product, krypton (Kr, atomic no. = 36)?
A. The isotope of krypton generated might have a short half-life and had undergone radioactive decay to some other element. B. Krypton is a noble gas and therefore chemically unreactive, making it difficult to characterize by chemical means. C. Krypton is a noble gas and it may have diffused out of the sample. D. both A and B E. all of the above
Most phytoplankton stay near the surface to absorb red light
a. True b. False
Fog is more likely to form when air temperatures are
A) colder than the surrounding land. B) warmer than the surrounding land. C) the same as the surrounding land. D) rising.
The rates of plate movement are comparable to those of human fingernail growth.
Answer the following statement true (T) or false (F)