Determining Population Size There are four basic Methods that ecologists use to determine population size? Direct observation Indirect observation.
Interactions Among Living Things. Adapting to the Environment Natural Selection – a characteristic that makes an individual better suited to its environment;
Chapter 9: The Human Population. Demography Definition: the study of populations, most often human populations Definition: the study of populations, most.
Population Changes How populations grow, shrink, and change.
Populations Ch.19. (19-1) Understanding Populations Population: group of 1 species living in the same place at 1 time 3 characteristics: –Size –Density.
1. 7 Billion – Videos 2. 7 Billion – Agree or Disagree 3. Intro to Populations - Notes Populations.
Essential Question: What is Geography? Warm-up: 1. What does the word geography mean? 2. What are the 5 themes of geography? 3. Why do we study geography?
50,000 B.C.1Hunter-gatherer Societies 8,000 B.C.5Agricultural Revolution 1,000 B.C.50 1 A.D.170 1000 A.D.254 1250 A.D.400Black Plague 1300 A.D.360 1350.
Preston High School CGW 4UI World Population: Growth & Trends.
Opening Assignment Study your Chapter 13 questions to prepare for today’s review game for extra credit points on the test tomorrow.
Natural Selection – a characteristic that makes an individual better suited to its environment may eventually become common in that species. Natural selection.
Preston High School CGW 4UI World Population: Growth & Trends