Bellwork - slates & erasers on desks!

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