section 3

Question 1

3 stages of air pollution

Answer 1

release from the source
dispersion of the chemical in the atmosphere
deposition in soil/water

Question 2

groundwater

why do contaminents build up more in groundwater than in flowling water

Answer 2

in the top portion of soil, the space between the soil grains is partly air+water

groundwater moves slowly-contaminents cant be dispersed quickly

Question 3

permeable soil

pore

Answer 3

has connected pores where water can flow through

tiny spaces between soil grains

Question 4

name 7 pollutants that enter groundwater

Answer 4

• minerals in rocks+soils
• organic substances
• substances leached from landfills
• leak from piplines/storage tanks
• inorganic substances for roads, home, agriculture
• micro-organisms from storage tanks/sewage sewage ponds
• household chemicals

Question 5

leachates

Answer 5

when water lands on the ground it may soak through soil and move downward
it dissolves substances in the soil and carries them along

Question 6

dispersion

Answer 6

scattering of a substance away from its source

by spreading a substance out it’s less concentrated (less damage)

Question 7

dilution

Answer 7

adding large amounts of water to reduce the concentration

you can dilute a spilt chemical with water

Question 8

biodegration

aerobic?
anaerobic?

Answer 8

when living things break materials down

aerobic uses oxygen; anaerobic is in an enviornemnt with less oxygen

Question 9

phytoremedication

Answer 9

green plants removing/degrading hazardous material

plants are used to clean soil (then harvested +burned)
after theyve cleaned the soils new plnats are planted

Question 10

photolysis

Answer 10

breakdown of compounds using light [sunlight]

photodegradable plastic: takes 3 months to dissolve when in the sun (better for the environment)

Question 11

biomagnification

example?

Answer 11

increase in concentration of a chemical/element as it moves up the food chain

if an organism had 2ppm of a toxin and is eaten by a larger organism, then it will gain more ppm and the cycle continues