Acid/Bases
PH of 4, what am I?
Acid
Which substance is more toxic
Arsenic at 0.010 ppm or nitrate at 45 ppm
Arsenic at 0.010ppm
A pesticide used to target insects
Insecticide
What are the three organic nutrients
lipids, proteins, and carbohydrates
What is a common water pollutant?
Heavy metal, pesticides, fertilizers (plant nutrients), acids and salts
Litmus paper is blue
Base
what is acute toxicity?
when symptoms occur after only one exposure
What is a positive to the usage of pesticides?
- better crops and better yields
- more money for farmers,
- more food production
what is the process called that breaks down nutrients in the body?
digestion
what is non-persistent?
Can be broken down by natural processes
This scale measures how acidic or basic a substance is...
PH scale
what is it called when 50 percent of the population dies while the other 50 percent lives?
LD50 = lethal dose 50
what is DDT used for?
To exterminate mosquitoes and prevent the spread of malaria.
used in WWII to exterminate lice
How many essential vitamins do we need?
13
What are the three types of indicators?
1. Chemical
2. Biological
4. Microbiological
When an acid and a base react, they form water and salt this process is called?
neutralization
what does ppm stand for?
parts per million
what is biomagnification?
lower concentration levels of toxic substance at lower trophic levels then higher concentration levels of toxic substance in the high trophic levels.
What three compounds are found in commercial fertilizer?
Nitrogen, Phosphorus, and Potassium
What are CFC's and how are they created?
Chlorofluorocarbons and they are created by humans
This common household acid is found in citrus fruits like lemons and oranges. What is it called?
citrus acid
What was the drug used in the early 1960's to treat morning sickness and sleeplessness in pregnant women?
Thalidomide
How do you prevent pesticide resistance?
Use different pesticides
which vitamin is used to help with blood clotting and to help heal wounds
vitamin K
what is biodegradation?
allowing nature to break something down