Barrons AP Environmental Science

(C) A moderator is a substance, such as water or graphite, that is used in a nuclear reactor to decre ...

(B) Cities in China have the highest air pollution concentrations in the world. The World Health Organization ...

(C) N 1 = NO + (B – D) + (I – E), where N 1 = new population size, NO = original population ...

(D) Biodiversity is the degree of variation of life-forms with a given species, ecosystem, or biome and is ...

(B) Of more than 50,000 edible plant species in the world, only a few hundred contribute significantly to ...

(D) Everyday, over 1,000 Americans die as a result of nicotine addiction. ...

(B) Nitrification is a microbial process by which reduced nitrogen compounds (primarily ammonia) are sequential ...

(E) The mantle is the thick layer of hot, solid rock between the crust and the molten iron core. The man ...

(B) The lynx and hare populations have a predator-prey relationship. Disease, food supply, and other preda ...

(C) The first law of thermodynamics states that energy can be changed from one form to another but it cannot be ...

(C) Developing countries typically have a large proportion of their population in the pre-reproductive age c ...

(C) The term territory refers to any area that an animal of a particular species consistently defends agai ...

(C) Coexistence between direct competitors is not possible (i.e., when two species use the same resource in the ...

(C) Median lethal dose (LD 50 ) figures are frequently used as a general indicator of a substance’s acute ...

(C) Of the organisms listed, the hawks occupy the highest trophic level as carnivorous consumers. Biomagnification ...

(C) Negative feedback causes the initial change to be reduced, slowing down change and helping to regulate ...

(D) Refer to “Demographic Transition” in Chapter 6. ...

(A) During photosynthesis (CO 2 + H 2 O + sunlight → O 2 + C 6 H 12 O 6 ), which occurs in the leaves ...

(E) Heap leaching is an industrial mining process that is used to extract copper, nickel, gold, uranium, ...

88. (C) Let A = weight of crucible + filter + residue after 24 hours at 105°C (mg) Let B = weight of ...