In your own words describe how a continued increase in the human population will affect the planet positively and negatively. DO NOW

Homework and Announcements ▪ GIZMO Rabbit Populations ▪ Pages ▪ Endangered Species Project due on Thurs. ▪ USA TestPrep

Turnitin.com ▪ Class Name: 3rd Period Biology 1H ▪ Class ID: ▪ Password: science3

Title: Human Population ▪ L.O. SWBAT identify human population dynamics

5.3 Human Population Growth ▪ The human population, like populations of other organisms, tends to increase. The rate of that increase has changed dramatically over time. ▪ We are expected to reach over 10 billion by 2030!

Human Population Growth ▪ Was slow at first.. Half the children born didn’t make it to adulthood due to disease and very little food. ▪ Families had many children to make sure some survived to continue the family line.

Human Population Growth ▪ Civilization advanced, leading to improved: ▪ Nutrition ▪ Sanitation ▪ Medicine ▪ Healthcare ▪ Death rate lowered, but birth rate dramatically grew… leads to what kind of growth??

Human Population Growth ▪ Thomas Malthus knew this exponential growth could not continue, and so he predicted that the limiting factors for the human population would be: ▪ Famine (limited resources) ▪ War (competition) ▪ Disease (disease)

Patters of Human Population Growth ▪ We have been growing exponentially since the 1900’s… yet we are starting to slow down (although increasing!) ▪ We may be entering the second phase of logistic growth! Why???

Patterns of Human Population Growth ▪ Demography: the study of human populations ▪ looks at birth rates, death rates, and age structure to help predict why some countries have a higher growth rate than others.

Patterns of Human Population Growth ▪ Demographic Transition: has 3 stages 1.Birth rate and Death rate are equally high 2.Death rate begins to fall, but birth rate remains high for a time 3.The birth rate falls to meet the death rate ▪ The U.S., Japan, and Europe have already completed this transition. Developing countries like Guatemala are still in stage 2.

Patterns of Human Population Growth ▪ Scientists look to age structures to help determine whether a country is growing or not. United States is stable, age structure is balancedMadagascar is growing, looks like a pyramid

Nat Geo Quick Clip

Summary ▪ 3- 4 Sentences discussing what we learned today. Writers block Restate the LO What are some limiting factors for the human population?

Homework and Announcements ▪ GIZMO Rabbit Populations ▪ Pages ▪ Endangered Species Project due on Thurs. ▪ USA TestPrep

Independent Work ▪ Complete Worksheet pages 56-58