g17.    Is some matter more useful than other matter?

Matter quality is determined by the usefulness of a resource. High quality matter is organized and concentrated. Low quality matter is disorganized and dispersed, often in the ocean or deep underground. Entropy is a measure of disorder. The law of conservation of matter states that no matter may be created or destroyed.  It can only be changed into another form.  Nothing can ever be thrown away. It takes energy to change forms of matter.

e04.    What sorts of resources do rangelands produce?

e13.    What is biomass?

e17.    How do organisms use matter?

e21.    What are chemical hazards?

e22.    What do we eat?

m03.    How can the forests, as resources, be sustained?

m11.    What is the aesthetic and recreational importance of organisms?

m16.    How are forests of commercial importance?

m22.    How are energy resources used?

m23.    What is energy efficiency?

m24.    How is energy used?

m29.    How is oil recovered?

m31.    Is nuclear energy a viable alternative?

m34.    How could food production affect the environment?

m41.    How can matter affect the environment?

m44.    Why are there detractors of pesticides?

m56.    How can we increase mineral resource supplies?

m57.    What are sources of solid waste?

m61.    Who recycles solids wastes?

m74.    How is soil important in the environment?

m75.    How can soil be conserved?

m77.    How is water used?

m81.    How can we increase our water supplies?

m83.    How do we produce food?