What is the approximate population of Australia?
A) 5 million
B) 13 million
C) 45 million
D) 23 million
E) 200 million
D
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What it the main difference between an ionic and a covalent bond?
A. Both bonds are the same, but named different to describe different atoms involved. B. The electrons in both types of bonding undergo an exchange. C. One is the sharing of a pair of electrons, and the other is the transfer of at least one electron. D. The electrons are traded between the two atoms and this keeps the atoms close. E. One involves electrons, and the other does not involve any electrons.
The __________ are the elite families with whom the military leaders made a pact in the early 1900s.
A. nikkeijin B. burakamin C. zaibatsu D. chaebol
The most abundant ion in seawater is ____________, which comes from the mantle through volcanic vents and
outgassing from mid-ocean rifts. Fill in the blank(s) with the appropriate word(s).
Sea otter reintroduction in Alaska has led to
A) extinction of sea urchins B) increase in kelp forests C) decrease in kelp forests D) ecosystem degradation