Consider all the economic and social indicators. Should these trends continue over the next 25 years, what effect would this have on the socio-economic conditions of various countries in the world?
What will be an ideal response?
Norway may be the richest nation, but may not have the highest life expectancy.
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Which of the following is true about the base level of a stream?
A) Base level indicates the normal (or base) flow level before flooding. B) The flat top of a mountain is the ultimate base level for most streams. C) A mountain is close to its base level if bedrock is close to the surface. D) Most streams have lower gradient close to their base level. E) Base level generally is near the steepest part of a stream's profile.
How many half lives must elapse before 75% of parent isotope becomes daughter isotope?
a) One half life b) Two half lives c) Three half lives d) Four half lives e) Not enough information given to answer this question
At the moment of the Big Bang, both ____ and ____ were compressed into an infinitely small hightemperature
and high-density state. a. matter, energy b. gravity, energy c. nuclear power, matter d. energy, matter e. matter, weak nuclear forces
In a mature forest in a national park, maple trees grow very large and live more than 80 years. Over an average lifetime, a tree produces more than 100,000 seeds, of which only 2 to 3 sprout and grow to maturity. This maple tree is
A) K-selected and exhibits a type I survivorship curve. B) K-selected and exhibits a type III survivorship curve. C) r-selected and exhibits a type I survivorship curve. D) r-selected and exhibits a type III survivorship curve.