Vocabulary
increase in number of an organism
population growth
How does being eaten cause a population to decline?
organisms are being killed and also they are unable to reproduce
The cause of the decrease in the sportfish is due to competition with the carp. This is an example of which part of the CER?
Claim
Cause: Predators eat prey
Effect: fewer survive than reproduce, more die, population declines
What is criteria?
The desired characteristics
the act of eating another organism
predation
What is the most likely cause of the sportfish decline?
Competition with the BHC over resources/food (zooplankton)
"Big headed carp do not eat sportfish" is an example of which part of a CER
evidence
Cause: Changes to the physical environment reduces access to resources
Effect: Organisms have less food/resources, grow and reproduce less, populations decline
What is a constraint?
Something that limits what you can do, for example cost/time
When two organisms are using the same resource it is called....
competition
How might species/organisms benefit each other (give an example)?
Teacher will decide if example fits!
"The amount of zooplankton decreased greatly after the carp arrived in the river" is an example of which part of the CER?
evidence
Cause: The arrival of a new species increases the number of organisms sharing a food resource
Effect: The more organisms have to share/competition, grow and reproduce less since they don't have as many resources, more die than are born, population declines
What is the importance value
A value that you assign to the criteria to show how much it is valued. Must total 100
A beneficial relationship between 2 organisms
mutualism
What happens when organisms use the same resource? (2 examples of competition)
Competition. One population may increase if it is a stronger competitor, or both populations may decrease if there are limited resources to share
"Therefore the complainers' claim is supported by the evidence because the expected observations do match the observed, this means the complainer's claim can be true." This is an example of which part of a CER?
Conclusion/reasoning
Cause: Two species interact in a way that helps both organisms
Effect: grow and reproduce more because they get help gathering resources, more are born than die, population increases
What is a rating scale?
Usually numbered 0-3, 0-4, 1-4 and gives specific qualifications to give a rating to a criteria
Two species that rely on the other to survive, if one/both populations will decline if something happens to the other
interdependence
How do changes in the environment cause populations to change?
Examples: water depth, water temp, human-made changes (positive or negative), seasons, etc
What is a scientific principle?
the scientific facts that everyone agrees to be true
Cause: The Big headed carp were introduced to the Mississippi River
Effect: Escaped the catfish breeding grounds, swam upriver, ruined the ecosystem because they are an invasive species, ate too much zooplankton (competition), etc
How do you calculate a score?
Multiply each rating by the importance value for that criteria, add all scores for a final score