Unit 3: Populations
A line that represents the relative survival rate of a group of same-age individuals from birth to maximum age reached by any one individual of the group.
What is the Survivorship Curve? (APES CED pg. 75)
What is the order of the atmospheric layers? (APES CED pg. 91)
Drip, flood, furrow, and spray.
What are the various methods of irrigation? (APES CED pg. 107)
Burning organic material for energy. Contributes to the overharvesting of trees and releases multiple greenhouse gases into the atmosphere.
What is Biomass energy? (APES CED pg. 135)
The principal gases fueling the greenhouse effect.
What are Carbon Dioxide, Methane, Water Vapor, Nitrous Oxide, and Chlorofluorocarbons? (APES CED pg. 192)
Exceeding the carrying capacity often results in famine, disease, or conflict; ecological dieback.
What is overshoot? (APES CED pg. 76)
The categories of soil based on composition and organic material.
Horizons (APES CED pg. 89)
A shift in agricultural strategies and practices to increase food production.
What is the Green Revolution? (APES CED pg. 105)
Methods for retaining energy.
What is Energy Conservation? (APES CED pg. 141)
What is ocean warming? (APES CED pg. 196)
A model that represents a population's growth rate with varying shape.
The drifting of wind and ocean currents due to the Earth's rotation.
What is the Coriolis Effect? (APES CED pg. 92)
Combined methods to effectively control pest species.
What is Integrated Pest Management? (APES CED pg. 118)
Combines hydrogen and oxygen in the air to form water and release energy as electricity in the process.
What is a Hydrogen Fuel Cell? (APES CED pg. 139)
Increased UV radiation reaching Earth's surface, increasing sun exposure.
What issue does ozone depletion arise? (APES CED pg. 190)
A staged model of a country's industrialization, birth rates, and death rates.
What is a Demographic Transition Model? (APES CED pg. 81)
Trade-wind phenomena related to changing ocean temperatures in the Pacific Ocean.
What are El Niño and La Niña? (APES CED pg. 96)
Depletion of resources and saltwater intrusion into the water cycle.
What is Urbanization? (APES CED pg. 114)
Energy is derived from splitting Uranium-235 atoms in a reaction known as fission.
What is Nuclear Power? (APES CED pg. 133)
HIPPCO (habitat devastation, invasive species, population growth, pollution, climate change, and overexploitation), leading to a decrease in biodiversity.
What are the human impacts on biodiversity? (APES CED pg. 200)
A deer wildlife area has a population of 1,200. The population continues to grow at a growth rate of 30% every 3 years. The carrying capacity for the population is 1,400. In 3 years, what phenomena will the deer population experience?
Overshoot (APES CED pg. 76)
Clay soil has a water-holding capacity of 3 inches, while sandy soil has a capacity of 1.5 inches. In a percentage, how much greater water can clay soil hold than water?
100% (APES CED pg. 90)
A farm uses 18,000 liters of water per day to irrigate crops. After switching to drip irrigation, water use decreases by 35%. How much water is being saved per day after the switch?
6,300 liters. (APES CED pg. 107)
A coal-fired power plant burns 4,500 tons of coal each day. Each ton of coal releases 2.86 metric tons of CO₂. How many metric tons of CO₂ does the plant release each day?
12,870 metric tons. (APES CED pg. 148)
Atmospheric CO₂ concentration increased from 300 ppm in 1970 to 410 ppm in 2025. What is the average increase per year?
2 ppm per year. (APES CED pg. 193)