(A) A
(B) B
(C) C
(D) D
(E) E
- The densest populations of most organisms that live in the ocean are found
near the surface. The most probable explanation is that (A) the surface is
less polluted
(B) the bottom contains radioactive material
(C) saltwater has more minerals than freshwater
(D) the light intensity that reaches the ocean decreases with increasing depth
(E) the largest primary consumers are found near the surface
- Of the following sources of pollution, which would NOT be classified as a
point source of pollution?
I. Sulfur oxides released from an electrical generating plant II. Oil,
grease, and toxic chemicals showing up in a stream III. Cyanide leaking
from a heap leach pile at an abandoned gold mine site IV. Diesel
exhaust soot coming from trucks on the interstate
(A) I and III
(B) I and IV
(C) II and IV
(D) I, III, and IV
(E) I, II, III, and IV
- Certain volcanoes are built almost entirely of fluid lava flows that pour out
in all directions from a central summit vent or groups of vents. They build a
broad, gently sloping, dome-shaped cone. These cones are built up slowly
by the accretion of thousands of highly fluid basalt lava flows that spread
widely over great distances and then cool as thin, gently, dipping sheets.
These types of volcanoes are known as (A) lava domes
(B) composite volcanoes
(C) cinder cones
(D) shield volcanoes
(E) stratovolcanoes
- Of the causes of preventable deaths in the United States listed below, which
