Bellwork- slates & erasers on desks!
Hunting permits are frequently issued to help control certain populations of animals.
1. When would a state want to issue a LOT of permits for deer hunting?
2. How could this affect the wolf population in the area?3. Are deers autotrophs or heterotrophs? What about wolves?
Explain your answers.
Announcements
• Meet in M1 computer lab tomorrow for science fair proposals & research (take your 3 ring binder WITH YOU today!)
• Science Café on MONDAY! Bring a snack for the class
Population Notes (adding new info today)
Instructions for notes/participation
When you see this pencil symbol next to something, you must write it in your notes
When you see the marker, answer the question on your slate & wait for the guest teacher to ask everyone to show
(No marker? Participate on scratch paper)
What would happen if bacteria could reproduce indefinitely?
Exponential Growth
On a slate, draw what you think
the population
graph would look
like
What would happen if bacteria could reproduce indefinitely?
Exponential Growth
Draw a picture of an exponential growth graph in your notes
What would happen if bacteria could reproduce indefinitely?
In just 36 hours a single E. coli
bacterium would replicate enough times to cover the Earth in 1ft deep of its offspring
So why aren’t we covered in
bacteria?
What would happen if bacteria could reproduce indefinitely?
In just 36 hours a single E. coli
bacterium would replicate enough times to cover the Earth in 1ft deep of its offspring
So why aren’t we covered in
bacteria?
Limiting Factors! (Turn and tell your neighbor- what
are the 4 limiting factors we discussed block day…)
World Population = 7.0 billionHuman Population Clock:
http://galen.metapath.org/popclk.html
What eventually happens to the
graph?
World Population = 7.0 billionHuman Population Clock:
http://galen.metapath.org/popclk.html
POPULATION CRASH!!!!
World Population = 7.0 billionHuman Population Clock:
http://galen.metapath.org/popclk.html
Have we reached our carrying capacity, or have we overshot it?
Explain why.
Human growth patterns- we use age structure graphs
Human growth patternsAt what ages do you
see more females than males?
75-79 & 80+What age group makes
up the biggest % of Mexico’s population?
Under 5(5-9, & 15-19 are very close)
Human growth patterns
Will Mexico’s
population increase, decrease,
or stay about the
same?
INCREASE
Human growth patterns
Will Sweden’s population increase, decrease,
or stay about the
same?
DECREASE
Human growth patterns
Will United State’s
population increase, decrease,
or stay about the
same?
INCREASESLOWLY
What caused this bubble of middle-aged
adults?
Honey, I’m hooome!
Human growth patterns- add these three graphs to notes
Graph & Conclusion- due TODAY!• Graph how the population of jackrabbits vs coyotes
change over time (think about what kind of graph this is…)• Conclusion paragraph (complete sentences, in lab book)• When finished turn the graph into front basket• **If time- work on the Critter: Ecology Outline to get a
head start on your next critter project
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