Midterm 1 Flashcards
What is the correct residence time of carbon dioxide
44 years
The Ogalla Aquifer provides what
the us corn belt with its agricultural water supply
The only input to a terrarium is
sunlight
Oxygen production began on earth via photosynthesis how many years ago
3.5 billion
What best describes estuaries?
Where rivers empty into the ocean, providing nutrients
What best describes an ecosystem with high inertia
A complex ecosystem that resists change
Has Canada reached zero population growth
no
What is most affected by the news media
public perception of risk
The release of rabbits in Australia is an example of what kind of human impact on ecosystems
introducing competitors
Crude birth rate in a society depends on what
age at which typical marriages take place
Energy is always lost in the form of what
heat
What country has had a successful non voluntary family planning program?
China
The increase in the worlds population before about 1600 AD was considered as what
linear
What is the term for the region of the atmosphere nearest to the surface of the earth
Troposphere
A hazard can be defined as what
any situation that could result in a bad outcome
What is not a common in the sense of the “tragedy of commons” by Garrett Hardin
the fish of the grand banks
What is a biotic portion of an ecosystem
anything living
True or false; Energy cycles through ecosystems but the flow of nutrients is one way
false
The second law of thermodynamics
tells us that we lose energy as heat whenever we convert energy from one form to another
True or False;The introduction of the Nile perch into lake Victoria is one of the few examples were humans have altered an ecosystem for the better
false
Anytime you reduce a risk you incur a what
cost
What is the average number of children born per female equal to
total fertility rate
What biome would one expect in an area with high temperatures and high rainfall amounts
a tropical rainforest
What is the primary reason of the increase in the worlds population in the last 100 years
reduction of the death rate
What kind of population would one expect to have the highest crude birth rate
A population with an average of 15 in which many individuals get married before 18 years of age
What gas is the major component of Uranus
hydrogen
A country has a CBR of 32 and a CDR of 17 what is the countries rate of natural increase
1.5%
True or false; In a food chain energy flows in a cycle
false
Employment rates of women, cultural values, and use of contraceptives are examples of factors affecting
crude birth rate
What country has had a very unsuccessful voluntary family planning program
India
The definition of Crude birth rate is
the number of births per 1000 per year
CBR - CDR / 10 is what
natural increase
The population of Earth goes up by about what each year
90 million
