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100
all biomass get its energy from the
sun
100
what category is at the bottom of the food chain
producers
100
caused by a loss in habitat and over hunting
What is loss of biodiversity
100
what percent of energy from the sun is used during photosynthesis
1%
100
True or false the phosphorus cycle has no gas phase
true
200
What is the main element that causes eutrophication
What is Phosphorus
200
what is the world population?
6-7 billion
200

What is a definitive feature of stage 1

- Very high birth rate

- Stable Population

- Very high infant mortality

200
True or false obesity and poverty have a direct correlation
true
200
most populated nation
What is china
300
the amount of a chemical that kills 50% of the animals in a test population
What is LD-50
300
ocean floor where there is no light
What is abyssal zone
300
first layer of the atmosphere
What is troposphere
300
substance that causes cancer
What is carcinogen
300
lowest level of a body of water
What is benthic zone
400
number one waste based weight
What is paper and cardboard
400
energy is created nor destroyed
What is 1st law of thermodynamics
400
bacteria convert ammonia back into N2
What is denitrification
400
percentage of freshwater on earth
What is 2.5%
400
percent of seawater on earth
What is 97.5%
500
to find the doubling time you must divide by
70
500
the end result of eutrophication
What is hypoxia
500
where the ozone layer is found
What is stratosphere
500
the number of different species found in a particular area
What is species richness
500
naturally replenished over a human time scale
What is renewable
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