Food Chains/Webs
The original energy source for all organisms in most ecosystems is _____________________.
the sun
A relationship between 2 organisms where both benefit is called __________________.
mutualism
A consumer that eats a combination of meat and plants in considered an ________________.
omnivore
Organisms that can make their own food (usually through the process of photosynthesis) are called _______________.
producers
In the water cycle, snow, rain, sleet, and hail are different examples of _________________.
precipitation
The arrows in a food chain show...
the direction that energy flows as organisms feed
Two bucks fight for dominance and a mate. This is an example of what?
competition
community
biodiversity
Carbon that has been buried deep underground for a long time can turn into ___________________. Coal, gas, and oil are examples of this.
fossil fuels
Which food chain would be most efficient?
1. grass -> rabbit -> fox -> wolf
2. grass -> rabbit -> fox
3. grass -> rabbit
3. grass -> rabbit
SHORTER FOOD CHAINS ARE MORE EFFICIENT!
A relationship between 2 organisms where one organism is harmed and the other benefits.
Parasitism
Nonliving parts of an ecosystem are called _____________.
abiotic
The majority (~78%) of the atmosphere is made of __________________.
nitrogen
______% of energy is transferred up to the next trophic level in an energy pyramid.
10%
A relationship between 2 organisms where one OR both of the organisms benefit is called _______________.
symbiosis
The largest number of individuals within a species that the environment can sustain is called ______________________.
carrying capacity
The study of organisms and how they interact with their environment.
ecology
____________ fix nitrogen from an unusable form into a form that plants can absorb and use to make amino acids.
bacteria
Organisms that eat herbivores are what level of consumers?
(plants -> herbivores -> _________________ -> tertiary consumers)
secondary consumers
As cows graze and walk in a field they kick up bugs for egrets to eat. What kind of relationship is this an example of?
commensalism
A group of organisms of the same species living in the same area is called a _________________.
populaiton
All of the living AND nonliving things in a designated area is called an ___________________.
ecosystem
The process when water is heated up by the sun and turns from liquid to a gas it is called ___________________.
evaporation