The term "smog" originally referred to a mixture of smoke and fog
Indicate whether the statement is true or false
TRUE
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In food chains, energy moves from one source to the next, resulting in a loss of usable chemical energy to the environment. What is typically the amount of chemical energy transferred between trophic levels?
A. 5% B. 10% C. 15% D. 90% E. 100%
All chordates are vertebrates
a. True b. False
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) Krypton is a noble gas and it may have diffused out of the sample. B) The isotope of krypton generated might have a short half-life and had undergone radioactive decay to some other element. C) Krypton is a noble gas and therefore chemically unreactive, making it difficult to characterize by chemical means. D) both A and B E) all of the above
Melanesia is also known as ______ Islands.
A. Small B. Black C. Many D. Indian