The dosage of a toxin it takes to kill 50 percent of the test animals is termed _______________.
LD50
100
True or False:
Pollen is a sometimes considered a naturally occurring form of air pollution
True
100
True or False: Methane is a greenhouse gas
True
100
What is most responsible for the dead zone in the Gulf of Mexico?
a) industrial air pollution
b) excess nutrients in the water
c) acidic pH levels
b) excess nutrients in the water
100
What does NIMBY stand for?
Not in my backyard
200
Which of the following is NOT considered a pathogen
a) the flu
b) tobacco smoke
c) athletes foot
b) tobacco smoke
200
What is thought to create the most greenhouse gases?
A) Belching cows
B) Fertilizers
C) Burning of fossil fuels
C) Burning of fossil fuels
200
Which is closest to the concentration of C02 in earths atmosphere today?
a) 280 ppm
b) 280 ppb
c) 380 ppm
c) 380 ppm
200
Turbidity is a measure of water's
A) Transparency
B) Cloudiness
C) Chlorination
B) Cloudiness
200
One acceptable way to dispose of hazardous waste is:
a) Deep well injection
b) dilution in the ocean
c) incineration
a) Deep well injection
300
The dosage at which negative effect occurs is reffered to as:
a) threshold dose
b) chronic dose
c) infective dose
a) threshold dose
300
How many oxygen atoms does ozone have?
A) 1
B) 2
C) 3
C) 3
300
Anthropogenic means.....
a) caused by nature
b) caused by humans
c) caused by burning fossil fuels
b) caused by humans
300
Which of the following is a point source of water pollution?
A) Smoke stack
B) Outflow Pipe
C) Runoff from streams
B) Outflow pipe
300
Waste water that has been treated and used to water lawns is known as:
a) green water
b) gray water
c) black water
b) gray water
400
A poison is an substance that has an LD50 of _______ or less
a) 500 mg
b) 50 mg
c) .5 mg
b) 50 mg
400
Which of following places would most likely have an inversion layer?
a) a city on the top of a mountain
b) an island city
c) an city in a mountain valley
c) an city in a mountain valley
400
Which is NOT a green house gas:
a) water vapor
b) nitrous oxide
c) ozone
c) ozone
400
Precipitation is considered acidic if it has a pH less than
A) 5.6
B) 7.0
C) 8.2
A) 5.6
400
Large hazardous waste sites designated for clean-up by the EPA are known as:
a) TOSCA sites
b) superfund sites
c) Surface impoundment sites