The name given to the short term (generally 6- to 18-month period), periodic change in the location of warm and cold water masses in the pacific ocean.
What is El Nino?
100
Buildings that have very poor air quality have a condition.
What is Sick-Building Syndrome?
100
The area of land that is drained by a river.
What is Watershed?
100
Flowering plants that produce seeds in fruit.
What are Angiosperms?
100
The probability of an unwanted outcome.
What is a Risk?
200
A drought where the water in the eastern pacific ocean is cooler than usual.
What is La Nina?
200
A sudden influx of acidic water that causes a rapid change in the water's pH.
What is a Acid Shock?
200
The amount of space between the particles that make up a rock.
What is Porosity?
200
Woody plants whose seeds are not enclosed in fruits.
What are Gymnosperms?
200
A verbal or graphical explanation for how a system works or is organized.
What is an Conceptual Model?
300
A thinning of stratospheric ozone that occurs over the poles during the spring.
What is an Ozone Hole?
300
A pollutant that is put directly into the air by human activity.
What is Primary Pollutant?
300
The ability of rock or soil to allow water to flow through.
What is Permeability?
300
The selective breeding of organisms by humans for specific characteristics.
What is Artificial Selection?
300
The process of breaking down food to yield energy.
What is Cellular Respiration?
400
A treaty that is ratified by 55% of the attending nations. It also requires developed countries to decrease emissions of carbon dioxide and other greenhouse gases by an average of 5% below their 1990 levels by 2012.
What is Kyoto Protocol?
400
Pollutants that form when a primary pollutant comes into contact with other primary pollutants or with naturally occurring substances such as water vapor and a chemical reaction takes place.
What are Secondary Pollutants?
400
Organisms that cause illness or disease.
What are Pathogens?
400
The ability of one or more organisms to tolerate a particular chemical designed to kill it.
What is Resistance?
400
The practice of growing, breeding, and caring for plants and animals that are used for food, clothing, housing, transportation, and other purposes.
What is Agriculture?
500
High-altitude clouds made of water and nitric acid.
What are Polar Stratospheric Clouds?
500
When air pollution hungs over urban areas and reduces visibility.
What is Smog?
500
A method of providing plants with water from sources other than direct precipitation.
What is Irrigation?
500
An inherited trait that increases an organism's chance of survival and reproduction in a certain environment.
What is an Adaptation?
500
A law that states that the greater the demand for a limited supply of something, the more that thing is worth.