Cycles & Cycles
What process turns liquid water into water vapor?
Evaporation
Daily Double!!!
What is a population?
A group of organisms of the same species living in the same area.
Grass → Rabbit → Snake → Hawk
This transfer of energy is an example of what?
Food chain
What relationship occurs when one organism benefits while the other is unaffected?
Mutualism
What is gradual change in an ecosystem's community over time called?
What is ecological succession?
Nitrogen (N2)
What term describes organisms moving into a population?
Immigration
What organism makes its own food and is at the base of the trophic pyramid?
Producer
What relationship exists when two organisms are fighting for the same resource
Competition
What is an event that alters an ecosystem called? Examples include invasive species and deforestation.
Ecological disturbance
Carbon dioxide (CO2)
A population has 50 births, 20 deaths, 10 immigrants, and 15 emigrants. How did the population change?
Increase by 25.
Grass → Rabbit → Snake → Hawk. What trophic level is the snake?
Secondary consumer
A tick gets nutrients from a dog while harming the dog. What relationship is this?
Parasitism
What organisms are often among the first to colonize an area during primary succession?
Pioneer species like lichens
A population grows rapidly and then levels off because resources become limited. What type of growth is this?
Logistic growth.
About what percentage of energy is typically transferred from one trophic level to the next?
10%
A cheetah catches and eats a gazelle. What ecological relationship is this?
Predation
What type of succession begins where there is little or no soil?
Primary succession
Nitrogen fixation, the process where nitrogen from the air is made useable for other organisms, is done by what 2 thing?
Lightning and bacteria
What are the parts of the ecosystem that prevent populations from growing exponentially? Examples include natural disasters, disease, and predators.
Limiting factors
What is an organism called that gets energy by eating other organisms?
Consumer
What word describes the total variety of species in an ecosystem?
Biodiversity
What type of succession might happen after a forest fire?
Secondary succession.