Minerals are formed by the process of
A) crystallization.
B) magma differentiation.
C) silica enrichment.
D) partial melting.
A
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The ____________________ occupies those parts of the atmosphere, hydrosphere, and geosphere where life is found
Fill in the blanks with correct word
Your book states that a "sewage treatment plant removes 70% of the phosphorus and 50% of the nitrogen that flows through it". According to the Law of Conservation of Matter, there is no detectable increase or decrease in the quantity of matter during an ordinary chemical change. Assuming that only ordinary chemical changes occur in sewage treatment plants, how is the nitrogen removed?
A. denitrification B. nitrogen fixation C. biodegradation D. combustion
Consider the Individuals Matter essay for this chapter about the scientists Sherwood Rowland and Mario Molina
These two scientists brought the problem with CFCs to the attention of the entire world, and in doing so shocked not only the scientific community, but the $28 billion per-year CFC industry by calling for an immediate ban of CFCs in spray cans. Comment on what this experience must have been like for Rowland and Molina, what has happened because of their work and decisive mandate for action, and what might have occurred if they had chosen not to take such decisive action. Do all scientists have the integrity of these two? Why or why not? What will be an ideal response
The diseases that are caused by water pollution in the major cities of developing countries are mainly due to the
A. Practice of swimming in water contaminated by toxic chemicals B. High amount of runoff that includes pesticides, fertilizers, and animal waste C. Lack of waste treatment systems to accommodate the population D. High number of industries that dump their wastes into surface water E. High use of pesticides and fertilizers by urban residents