Nutrients
The primary difference between a MICRO nutrient and a MACRO nutrient?
Micro needs small amount, Macro needs large amount
What is the purpose of a pesticide
To kill a particular species of pest
What is the range of pH values that acids fall under.
Less than 7
What does ppm stand for?
Parts per million
The term used to describe substances that breakdown easily to natural forces
Biodegradable
The macronutrient that is used as a short-term burst of energy is...
Carbohydrate
DDT is often referred to as a "persistent polluter". What is meant by this label?
It is a pollutant that is difficult to get rid of and remains in the environment for long periods of time.
What is the range of pH values that bases fall under.
Greater than 7
A substance has a concentration of 25 ppm. If a substance has 10 million ml of volume, how much of the pollutant is dissolved into the substance.
250 ml
Scientists investigating how many midgeflies live in a river system would be...
biological monitoring
The macronutrient that is used as long term energy storage is...
Lipids (fats)
An lake has three primary species of animals in its food chain: mosquitoes, small robins that eat the mosquitoes, and predator eagles that eat the robins. If a toxin was sprayed in this environment, which species would we expect to have the greatest concentration over time?
Predator Eagles
What happens to the pH when an acid and a base are reacted together and what is this type of reaction called?
pH stabilizes towards 7
Neutralization
What does the "50" stand for in LD50?
50 % of a population
In order to prevent leaching into the soil, many landfills will have layers made of ________ at the bottom.
Clay or plastic
The macronutrient that is used to build the structure of cells across the body is...
Proteins
This term is the process by which pesticides carried and dispersed by the wind, eventually fall back down to the ground and come to rest.
Deposition
A student dealing with a basic chemical exposes it to a red and blue litmus paper test. What color should this student expect to see on both papers?
Blue
True or false. A substance having a low LD50 number means its not that dangerous.
False. Low means danger!
Bioremediation is the process where...
Living things help reclaim polluted environments
Some metals on the periodic table are necessary for human growth as micronutrients. Name 2 of them.
calcium, magnesium, potassium, sodium, iron, zinc, copper, manganese, molybdenum, and cobalt
Two-part Question.
What was DDT originally meant to target, and what were the unintended side-effects that got it banned?
Originally targeting mosquitoes, ended up affecting humans
A wildlife preservation group is adding large pallets of limestone to a lake in order to counteract the acidification of the lake. What byproducts would we expect to see from this neutralization reaction?
Water and Salts
A pollutant was sprayed over a farmers field that measured several hundred acres. The pollutant then was dispersed by rainwater runoff. Would this be considered a Point source or a Non-point source pollutant?
Non-point source
E-waste (electronic waste) is primarily dangerous because of the presence of this class of chemicals.
Heavy Metals