The variety of life in all its forms, levels and combinations
100
What is an independent variable?
The variable that is manipulated in an experiment. It does not rely on the results of another variable.
100
An organism that makes its own food
Producer
100
What is carrying capacity?
Maximum number of organisms that can live somewhere, based on the food, water, and free space there
100
What is ecological succession?
The observed process of change in the species structure of an ecological community over time.
200
What is a dependent variable?
A variable whose value depends on that of another.
200
What is a secondary consumer?
An organism that eats primary consumers
200
What is a limiting factor?
It determines carrying capacity.
200
What is primary succession?
It occurs in an area that is barren and lifeless
300
What are the 3 different utilitarian values?
Goods, services, information
300
What is a control?
Stays stable throughout an experiment. It is used as a comparison
300
A food web shows all of the...
Feeding relationships in an ecosystem
300
When a population is below its carrying capacity, it will ________ in size
Increase
300
What is secondary succession?
The growth of organisms where there were species before, and there was a recent disturbance
400
What are the three different kinds of biodiversity we have?
Diversity of genes, diversity of species, diversity of ecosystems
400
A student wants to conduct an experiment to find out how pulse rate changes as the length of time spent exercising increases. What would the dependent variable be?
Pulse rate
400
What is biomass?
The total weight made up in plant or animal tissue
400
When a population size becomes stable at the carrying capacity what will happen to the birth rates and death rates?
They will be equal
400
What is a pioneer species?
The first species to grow in succession. Ex: lichen
500
What are the 5 major threats to biodiversity (think HIPPO)
Habitat loss, introduced species, pollution, population growth, over-consumption
500
A student hypothesized that the amount of sunlight a sunflower plant receives determines the number of sunflower seeds the plant produces. In her experiment, the number of seeds produced is what kind of variable?
Dependent variable
500
On the food web arrows show how...
Energy flows through the food web
500
If a population increases too much and rises above its carrying capacity, it will ___________ in size.