Population Change
What two processes determine whether a population grows, shrinks, or stays the same?
Births and deaths
What do we call a diagram that shows who eats whom in an ecosystem?
A food web
Where do organisms get the energy needed for reproduction?
From food they eat
What is a direct effect in a food web?
A change between populations that eat one another
If they could talk, what do you think dogs would say?
Who knows?
What happens to a population when the number of births equals the number of deaths over time?
The population stays stable
In Glacier Sea, what population is a direct food source for moon jellies?
Zooplankton
What type of molecules store energy that organisms use for growth and reproduction?
ESM
What is an indirect effect?
A change that affects populations not directly connected by eating
Create a short interpretive dance that teaches your class one of our vocab words from this unit.
Whoa. You guys are nerds.
If deaths increase while births stay the same, what happens to population size?
The population decreases
What do we call a change to a population that happens because of a change to their food source?
Direct effect
Why does an increase in available food often lead to more births in a population?
More energy allows more organisms to reproduce
Explain how a change in one population can cause unexpected changes far away in the food web.
Changes ripple through energy and predator-prey relationships
If you could turn any movie into a school play, which would you choose? What teachers would play which part?
ORLY?
A population is increasing even though individuals are still dying. What must be happening?
Births are greater than deaths
If a predator population decreases, what is the most likely immediate effect on its prey population?
The prey population increases
Why did the one group od crickets reproduce so much more that the other group?
They had more ESMs from the sugar
What happened to the Chupacabras when the Skunk Apes were introduced to your ecosystem?
They decreased
Create a human pyramid. You have 30 seconds.
hahahahaha
Explain why population size is always changing at the individual level, even when the total number stays the same.
Individuals are constantly being born and dying, even if totals balance out
What do we call the part of an experiment that we change?
Independant Variable
Over the last few decades the population of rattlesnakes has increased. What is the best explanation for the increase in the size of the rattlesnake population?
a.) The rattlesnake population is always increasing because nothing eats rattlesnakes.
b.) Fewer rattlesnakes were born than died.
c.) More rattlesnakes were born than died.
d.) Many rattlesnakes were born and none of them died.
C
What is the greatest NFL football franchise of all time?
Green Bay Packers
Create a rap that teaches ONE concept from this unit.
A-mazing.