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Chapter 5- Final
Populations Study Stack
| Question | Answer |
|---|---|
| What are the 3 characteristics used to describe a population | geographic distribution population density growth rate |
| What is an example of population density? | 500 deer in cass county (number, population, location) |
| When the birthrate in a population is HIGHER than the death rate, the population __________________. | Increases |
| When the death rate in a population is HIGHER than the birthrate, the population ____________________. | Decreases |
| When the birthrate and the death rate in a population are the same, the population will ___________. | Level off. (remain the same) |
| What are 3 factors that affect population growth? | Birth Rate Death Rate Immigration/Emigration |
| What is a limiting factor? | A factor that causes the growth of a population to decrease |
| What is carrying capacity? | The largest number of individuals of a population that a given environment can support. |
| What are two ways a population can decrease in size? | Emigration birthrates are lower than death rates |
| What are the density-dependent limiting factors? | Competition Parasitism/Disease Predation |
| What are the density-Independent limiting factors? | Human Disturbances Extreme Climates |
| Example of competition: | A pack of wolves fighting over food |
| Example of Extreme Climates: | Hurricanes destroying most of Puerto Rico |
| Example of Predation: | Bears killing fish |
| Example of Parasitism/Disease: | Ticks on a dog |
| Describe how human population has changed over time: | The population growth in humans was slow for thousands of years, 500 years ago there was rapid growth in the population. |
| Name the two historical revolutions that contributed to the change in human population: | Industrial and Agricultural |
| What happens first in demographic transition? | advances in nutrition, sanitation, and medicine mean more children survive to adulthood and more adults live to be older than before; death rate LOWERS. |
| What happens second in demographic transition? | Death rates fall, birthrates remain high- the population increases rapidly. |
| What happens third in demographic transistion? | Populations modernize and raise their standard of living. Birthrates are low and death rates are low. Population growth STOPS. |
Created by:
mrs.carlock
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