levels of organization
What is an organism?
A living thing.
The living parts of an environment.
biotic factors?
A group of the same species living in the same area.
population?
the number of individuals born in a population over a certain time.
birth rate?
The number of individuals living in a certain amount of space.
population density?
what is a population?
A group of the same kind of organism living in the same area.
The nonliving parts of an environment.
abiotic factors?
A group of similar organisms that can reproduce with one another.
species?
The number of individuals that die in a population over a certain time.
death rate?
What is the formula for population density?
Number of individuals รท area.
All the different populations living in the same area.
a community?
Name two biotic factors in a forest.
Trees and deer.
What is carrying capacity?
The largest population an environment can support with its available resources.
What is immigration?
When organisms move into a population.
Twenty rabbits live in an area of 4 square meters. What is the population density?
5 rabbits per square meter.
All the living and nonliving things interacting in an area.
ecosystem?
Name two abiotic factors in a pond.
Water and sunlight.
If 10 birds move into a forest, what happens to the local bird population?
t increases.
What is emigration?
When organisms move out of a population.
A population has more births than deaths, and no organisms move in or out. What happens to the population?
It increases.
A pond has fish, frogs, plants, water, and rocks. What do we call all these living and nonliving things interacting together?
An ecosystem.
Is a dead tree a biotic or abiotic factor?
Biotic, because it came from a living organism.
Name 4 resources that limit how many organisms can live in an area.
1. air, space, water and food
Seven deer leave a forest. What is this called?
Emigration
A field has 30 grasshoppers. Five are born, and 8 die. No grasshoppers move in or out. How many are left?
27 grasshoppers.