Chapter 19 Review
Science Pd. 1
Izzy Durcan
3/17/13
Multiple Choice:
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9.
Type of waste in most landfills is solid waste. C
Biodegradable are waste products easily broken down by nature. B
Overgrazing and poor cultivation lead to densification. D
Substances containing mercury would be classified as toxic waste. C
Legislation designed to help identify and clean up hazardous areas is Superfund. A
Substances that eat through metals and other containers are classified as corrosive wastes. D
Ocean dumping is source of pollution for land and water environments. D
Wastes that explode easily are classified as ignitable wastes. A
Grass clippings and other plant material are returned to the environment for recycling by
collecting them in compost piles. C
10. Sanitary landfills are not a method for disposal of hazardous wastes. D
Word Comparisons:
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Cyanide: toxic waste as sodium: reactive waste C.
Overgrazing: desertification as open dumping: landfills C.
Leaching: groundwater pollution as heat: incineration D.
Syringes: medical waste as fuel rods: radioactive waste A.
Deep-well injection: petroleum wastes as concrete vaults: radioactive wastes B.
Concept Review:
1. Radioactive wastes are disposed of by placing it in water. Then sealed in stainless steel tanks
encased in concrete and buried in concrete vaults underground.
2. Sanitary landfills spread waste in layers about 3 m deep. Secure chemical landfills are
constructed in areas of nonporous rocks to prevent leaching of pollutants into groundwater.
3. Composting enriches soil by being made up of biodegradable materials.
4. Disposal items and recycling programs help reduce waste in landfills.
5. Ocean dumping puts dangerous and hazardous products including chemicals into the water
hurting sea organisms. It also relates to land organisms because land organisms use the water to
drink from like us humans.
Think Critically:
1. Radioactive waste is very dangerous and is hard to dispose of because though some takes a
short period of time to decay others take thousands of years.
2. Incineration gets rid of most wastes. Also produces methane which can be used to generate
electricity.
3. I would not live in an area that was once a disposal site for chemical waste because the
chemicals are probably still there and are still hazardous to organisms.
4. Must treat Kerosene and gasoline with care because they can burst into flames at relatively low
temperatures.
Graphic Analysis:
1. Hazardous waste disposal.
2. If the waste was pumped above the first nonporous rock layer it could get in the drinking-water
aquifers and hurt organisms who drink that water.
3. Petroleum related wastes are disposed of in this refinery.
4. Nonporous rocks do not have holes or pockets where chemical can get through porous rocks do.
5. It is important waste is pumped beneath water table so if it leached it would not infect our
water supply.
6. I think site should always have proper equipment and containers so corrosive chemicals can’t
get through.