Molecules are ________
A) basic subunits of elements
B) positively charged particles
C) a chemical that cannot be broken or separated
D) atoms of an element
E) two or more atoms held together by chemical bonds
Answer: E
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Roughly ____% of the biomass consumed by any consumer is stored in the consumer as flesh
A) 5 B) 10 C) 15 D) 25
What physical processes are responsible for the creation of the Rift Valleys of eastern Africa?
A) converging tectonic plates B) erosion by rivers C) volcanism D) desertification E) tectonic plates that are separating
Pollutants that can be broken down by natural processes into simpler compounds are described as ____
A) hermatypic B) sustainable C) renewable D) biodegradable
How do environmental scientists deal with chemicals that sink to the bottom of an aquifer?
A) They leave them alone because the chemicals have not mixed with the drinking water supply. B) They add a coagulating chemical to make sure the chemicals solidify and remain deep in the Earth. C) They create a cone of depression some distance away to suck the contaminant in an opposite direction. D) They pump them up through a well drilled to the bottom of the aquifer.