Substances in the Environment
In humans, this macronutrient is important in the composition of bones and teeth, blood clotting and muscle and nerve function.
What is calcium
A harmful substance released into the environment
What is a pollutant
A substance with a pH higher than 7
What is a base
The amount of substance required to kill half of a polulation
What is Lethal Dose 50 (LD50)
A source of pollution in which pollutants are diffused and originate from no specific location
What is a non-point source
The nutrient that is used as a source of natural oils and stores energy.
What are lipids
A type of chemical designed to kill plants
What is herbicide
Any precipitation that has a pH less that 5.6
What is acid precipitation
This is the name given to the types of organisms that live in water to help determine water quality.
What are biological indicators
Reducing the concentration of a pollutant by mixing the polluting substance with large quantities of water or air.
What is dilution
The three major plant nutrients in commercial fertilizers
What are nitrogen, phosphorus, and potassium
Increased concentration of a material as it moves up the food chain
What is biomagnification
NaCl and H2O are always products of this reaction
What is neutralization
When the effects of a toxin cause serious harm after one dose.
What is acute toxicity
The process by which nature uses living things to clean up the environment.
What is biodegradation
The process of nutrients entering a plant through the roots
What is active transport
When runoff containing N, P, K makes its way to bodies of water this occurs
What is algal bloom
The difference between one number and the next on the pH scale represents this much of a difference.
What is a ten fold difference?
The result of the equation (solute/solvent x 1 million)
What is parts per million (ppm)
The movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution
What is osmosis
The nutrient responsible for healthy DNA/genetic material
What is nucleic acid
Term for the human activities which have increased the greenhouse gases in the atmosphere leading causing rising temperatures and climate changes.
What is enhanced greenhouse effect
Acidic lakes are sometime treated with this.
What is calcium hydroxide (liming)
The diversity of organisms living in a particular water way will decrease when (a) increases and (b) decreases
What is (a) acidity or temperature and (b) dissolved oxygen
A technique that can be used to reduce the concentration of harmful chemicals using plants
What is phytoremediation