A measure of the volume of soil void space relative to the total volume of earth material is called:
a. porosity
b. permeability
c. hydraulic conductivity
d. void ratio
a
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ANS: C
The life history of a star is based on its initial mass. Stars convert hydrogen atoms into larger carbon and oxygen atoms. Once the star begins to consume the carbon and oxygen it produced, it increases its energy output. The rate of this is determined by temperature and size. Information can be found in the section Stars and Seas
Which one of the following best illustrates a type of adaptation strategy in response to climate change?
A) Increasing the use of public transportation systems in cities B) Using solar and nuclear power to generate electricity instead of burning coal C) Widening the Panama Canal to allow larger ships to move from China to Europe D) Building taller levees along ocean coastlines to hold back rising sea levels and storm surges
How many different constitutional isomers are there with the molecular formula C2H4Br2?
A) 1 B) 2 C) 3 D) 4
This image contains a spit, which is identified by an arrow. (The arrow is only for identification purposes.) Using the shape of the spit, from which direction is the longshore current coming? Assume for our purposes that the top of the figure is north
A) From west to east B) From north to south C) From north to west D) From south to east