Topic 1
What are trace elements(micro-nutrients)?
Are elements that are needed in the body, but not in large quantities. these are called TRACE ELEMENTS. Are less than 100mg.
What does a fungicide control?
Controls DISEASE, FUNGI, AND BACTERIA
What does pH stand for?
"Power Of Hydrogen"
What is a Pollutant?
A POLLUTANT is any material, or form of energy that can cause harm to living organisms. It is any alternation to the environment that produces a condition which threatens living organisms.
what are the 4Rs?
Reduce, Reuse, Recycle and Recover
List the order of all of the chemicals in an artificial fertilizer
Nitrogen-Phosphorus-Potassium
What is the DDT stand for?
DICHLORODIPHENYLTRICHLOROETHANE
How does the process of dilution reduce harmful emissions?
DILUTION reduces the concentration of a pollutant by mixing it with large quantities of air or water.
Explain how a toxin is formed?
When chemicals can do harm to living organisms remain in the environment, a TOXIN is created.
What is Photolysis?
Is the process of compounds being broken down by sunlight.
What is a Substrate?
A SUBSTRATE is a material on which an organism moves or lives. Some organisms attach themselves to the substrate, while others obtain their nutrients from their substrate.
What is the main propose of an insecticide?
To control or kill insects.
What is the normal pH of a local river, pond, lake, ect?
This can range form 5.5-7.5. 7.5 would be considered the optimum amount for any natural body of water.
What does LD50 stand for?
LD stands for 'Lethal Dose'. 50 represents 50% of the subject group that will die, if they are given the specified dose, all at once.
What does CFC stand for?
Chlorofluorocarbons
What does having the Optimum Amount mean?
The OPTIMUM AMOUNT of a substance is the amount of that substance that provides an organism with the best health.
What was the original intention of DDT?
It was originally seen as a breakthrough in medicine.
What is the role of a Sorbent a scrubber?
A Sorbent absorbs or captures sulfur oxides.
Explain the difference between Acute and Chronic toxicities?
The difference is that acute toxicity has almost immediate symptoms after being exposed for little time, while Chronic toxicity happens when the toxic substance has accumulated as a result of multiple exposures.
What is Phytoremediation?
Is a technique that reduces concentrations of harmful chemicals in the soil or groundwater.
What is Hydrolysis?
Is the process in which compounds are broken down by water(aqueous solution).
Who invented DDT?
Paul Muller
A baker adds 0.02 mL of food colouring into 2000 mL of flour. Approximately how many parts per million (ppm) of food colouring is in this mixture?
10 parts per million (ppm)
What are the three values in which LD50 can be used?
Ingestion, inhalation, or skin contact
What is the main characteristic of a Macroinvertebate?
They do not have a backbone.