Pollution
Population
Energy
Human Footprint
100
The introduction of chemical, physical, or biological agents into a water source.
What is water pollution?
100
All members of a species living in the same place and time.
What is population?
100
Scientific name for natural gas
What is methane?
100
The study of how living things interact with each other and with their nonliving environment.
What is Ecology?
200
Water that goes to a treatment plant where it is filtered and returned to lakes and rivers
What is wastewater?
200
The number of individuals per unit area or volume.
What is a population's density?
200
Energy from sources that are constantly being formed
What are renewable resources?
200
People who obtain food by collecting plants and by hunting animals.
What are hunter gatherers?
300
Carbon dioxide, dust, pollen, and sulfur dioxide.
What are air pollutants?
300
Subtract the births from the deaths
How do you find the growth rate of a population?
300
Plant material, manure, and other matter that is used as an energy source
What is biomass?
300
The practice of growing, breeding, and caring for plants and animals that are used for food, clothing, housing, and transportation.
What is agriculture?
400
Snow, sleet, rain, or hail that has a high PH caused by sulfur and nitrogen oxides.
What is acid precipitation?
400
When populations double with each generation
What is exponential growth?
400
Most of the energy we use comes from these, natural, nonrenewable resources
What are fossil fuels?
400
The revolution that involved a shift from energy sources such as animal muscle and running water to fossil fuels, such as coal and oil.
What is the Industrial Revolution?
500
Burning fossil fuels
What is the main cause of acid precipitation?
500
The maximum population of a specific species that the ecosystem can support
What is carrying capacity?
500
Using the sun's energy to heat something directly
What is passive solar heating?
500
The number and variety of species that live in an area.
What is Biodiversity?
M
e
n
u