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Grade 9 Science Unit 3, Environmental Chemistry(70 questions and answers).
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Grade 9 Science Unit 3, Environmental Chemistry(70 questions and answers).
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Grade 9 Science: Unit 3,Environmental Chemistry(70
questions and answers)
element - answer pure substance that cannot be
broken down into other substances; substance
made up of only one type of atom
nitrogen fixation - answer process of changing
free nitrogen so that the nitrogen atoms can
combine with other elements to form compounds
that organisms can use; carried out mainly by
bacteria in the soil
pollution - answer any change in the environment
that produces a condition that is harmful to living
things
issue - answer any subject of importance about
which people have strong, conflicting points of
view
fertilizer - answer substance that enriches soil so
that plants will grow better
, pesticide - answer chemical used to kill pests
pest - answer organism that harms people, crops,
or structures
sewage - answer wastewater containing dissolved
and undissolved materials from your kitchen,
bathroom, and laundry
septic tank - answer underground container
where bacteria break down organic materials in
sewage before they are moved out to the soil
sewage treatment plant - answer building and
grounds containing special equipment to treat
wastes from homes, businesses, industries, and
institutions so the wastes can be disposed of
safely
effluent - answer wastewater released from a
factory or sewage treatment plant
storm sewers - answer large pipes that carry
runoff water from yards and streets directly
(without treatment) into a river, lake, or ocean
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