science quiz, Oct 8 Flashcards
What kind of particles does seawater put in the air?
salt particles
What kind of particles are blown by the wind?
mold and plant pollen
What else produces particles?
soil erosion, fires, volcanos
What allergy is caused by pollen?
Hay Fever
What is the pollen count?
average number pollen grains in a cubic meter of air.
What gives smoke its dark color?
particles of soot from burning fuel.
What kind of smog to sunny cities get?
photochemical smog
What is photochemical smog?
smog created by sunlight and chemicals
What chemicals in fossil fuels causes smog?
hydrocarbons and nitrogen oxides
What in coal gets in the air and causes acid rain?
sulfur oxides
After reactions, acid rain contains
nitric acid and sulfuric acid
How can you see the effect of acid rain in a city
Damages buildings and statues
How can you see the effect of acid rain in the country?
Harms trees (also kills fish and amphibians)
What have governments done to improve air pollution?
pollution control devices on cars and scrubbers (filters) in smoke stacks at factories.
How has air quality changed over the past 30 years?
better