- Powerful respiratory and eye irritants present in photochemical smog. They
are secondary air pollutants, not directly emitted as exhaust from power
plants or internal-combustion engines, and formed from other pollutants by
chemical reactions in the atmosphere.
- Commonly found in paints and solvents. Examples include benzene,
acetone, and formaldehyde.
- Most commercial fish are caught in which ocean?
(A) Atlantic
(B) Indian
(C) Arctic
(D) Southern
(E) Pacific
- Why is the bioaccumulation of harmful chemicals especially destructive in
species such as salmon?
(A) Salmon migrate long distances, allowing them to spread harmful
chemicals into many different ecosystems.
(B) Salmon are tertiary consumers and are at the top of the food pyramid.
(C) Salmon are a keystone species, meaning they are “key” in the health of
the ecosystem(s) they inhabit.
(D) Salmon are an increasingly endangered species.
(E) All of the above are true.
- Characteristics typical of an oligotrophic lake include which of the
following?
I. High dissolved oxygen content
II. High primary productivity
III. Clear water
(A) I only
(B) II only
(C) III only
(D) I and III only
(E) I, II, and III
- Which federal agency listed below does NOT manage designated federal
