Wednesday
April 23, 2014

Homework Help: science urgent please i really need your help

Posted by Mohammad on Tuesday, September 3, 2013 at 8:29pm.

Which of the following is an example of recycling?
a.
collecting and remelting aluminum beer cans
b.
cleaning and refilling soft-drink bottles
c.
selling used clothing at a garage sale
d.
saving leftovers in a peanut butter jar
e.
using household water to water a garden




Point sources of pollution
a.
enter ecosystems from dispersed and often hard-to-identify sources.
b.
include runoff of fertilizers and pesticides from farmlands and suburban lawns.
c.
are cheaper and easier to identify than nonpoint sources.
d.
are more difficult to control than nonpoint sources.
e.
are always found in rural areas.




Nonpoint sources of pollution
a.
enter ecosystems from single identifiable sources.
b.
are more difficult to control than point sources.
c.
include smokestacks and automobile exhaust pipes.
d.
are cheaper and easier to identify than point sources.
e.
are always found in rural areas.




You generally buy and eat microwave dinners. After dinner, cardboard tops and plastic trays remain. The least effective way to deal with this type of solid waste problem is to
a.
store leftovers in the plastic trays.
b.
put all of the solid waste in the household trash to be taken to the landfill.
c.
donate the plastic containers to the local nursery schools to use with preschoolers.
d.
recycle the components.
e.
all of these are effective.



Efforts to improve environmental quality in the United States are predominantly based upon __________ wastes and pollutants.
a.
reducing
b.
reusing
c.
recycling
d.
cleaning up
e.
there are no efforts to improve environmental quality in the United States.




Pollution prevention and cleanup can be encouraged by
a.
regulations.
b.
taxes.
c.
subsidies.
d.
education.
e.
all of these answers.




Two children in the United States have as much environmental impact as __________ children in the world's poorest countries.
a.
5-10
b.
10-20
c.
50-100
d.
70-200
e.
90-300




Which of the following pieces of evidence is likely to form the basis of an environmentalist's opinion?
a.
The rate of human population growth is declining.
b.
Food is more abundant and cheaper than at any other time in human history.
c.
Total forest area of the temperate zone region's industrialized countries increased during the 1980's.
d.
Consensus science suggests that potential global climate change from human activities should be taken as a serious problem.
e.
all of these answers.




Which of the following is NOT one of the five basic causes of the environmental problems we face?
a.
Poverty
b.
Rapid population growth
c.
Biodiverstiy depletion
d.
Unsustainable resource use
e.
Not including the environmental costs of economic goods and services in their market prices
f.
Trying to manage and simplify nature with too little knowledge about how it work




A resource that is owned by no one (or jointly by everyone in a country or area) but is available to all users at little or no charge is known as a
a.
free-access resource
b.
renewable resource
c.
community resource
d.
common-property resource
e.
all of the above
f.
none of the above
g.
both a and c
h.
both a and d

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