The scientific study of interactions among organisms and between organisms and their environment.
100
What is the main source of energy on Earth?
Sunlight
100
True/False
Water can also enter the atmosphere by evaporating form the leaves of plants in the process of precipitation.
False-transpiration
100
True/False
All the chemical substances that an organism needs to sustain life are it's nutrients.
true
100
True/False
Other soil bacteria convert nitrates into nitrogen gas in a process called nitrogen fixation.
False- it's dentrification
Nitrogen fixation is converting nitrogen gas into ammonia.
200
Which level of organization is a group of organisms so similar to one another that they can breed and produce fertile offspring?
species
200
If organisms don't get energy from sunlight, where does it come from?
inorganic material or inorganic chemical compounds
200
How are evaporation and transpiration related?
evaporation is part of the process of transpiration. They both keep water in the water cycle.
200
What is an algal bloom?
When there is a sudden increase in a limiting nutrient and there is an immediate increase in the algae from fertilized fields that have runoff into a water source.
200
What are detritivores and give me two examples of them.
Like ____________ nutrients are passed between organisms and the environment through biogeochemical cycles.
water
300
How does the way matter flows through an ecosystem differ from the energy flows?
Matter is recycled within and between the ecosystems, where energy is a one-way flow form the sun to the earth.
300
What is a trophic level?
each step in a food chain or food web.
400
What are the ecological methods that scientists use to guide inquiry?
Observing, experimenting, modeling
400
Energy flows through an ecosystem in one direction, from the sun or inorganic chemical compounds to ____________ and then to various heterotrophs (consumers)
autotrophs or producers
400
What is primary productivity?
the rate at which organic matter is created by producers.
400
Name two ways that carbon dioxide (Co2) is released into the atmosphere.
respiration, human activity, geochemical processes, such as volcanic activity and erosion,
400
The total amount of living tissue within a given trophic level is?
biomass
500
Suppose you wanted to know if the water in a certain stream was safe to drink. Which ecological method would you choose, and why?
Experimenting, to see if the water tested safe, or modeling to investigate whether pollutants or organisms could enter the water and make it unsafe.
500
The series of steps in which a large fish eats a small fish that has eaten algae is a
food chain
500
Where is most of the phosphorus stored in the biosphere?
in rock and soil minerals and in ocean sediments.
500
What is the difference in photosynthesis and chemosynthesis?
P-uses light energy C- uses the energy stored in chemical bonds
500
What is a biogeochemical cycle?
Elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another.