Reefs parallel to the shore but separated from it by wide, deep lagoons are called
A. atolls
B. lagoonal reefs
C. barrier reefs
D. fringing reefs
Answer: C
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What is the origin of the present topography of the Appalachian Mountains? What will be an ideal response?
Which of the following was not a legacy of Spanish rule in Latin America?
A. democratic governments B. a geographic system based on mineral exploitation and transportation to a few ports C. large estates engaged in raising livestock D. a rigid class structure
When light passes from one medium to another, resulting in a change in speed and direction of insolation,
A) transmission happens. B) Rayleigh scattering is the predominant effect. C) refraction occurs. D) it is usually not affected physically.
A group of concerned citizens was worried that their local water supply might be contaminated with naturally occurring arsenic. They decided to purchase a home arsenic monitoring kit and tested well water in their local area. After analyzing the data (shown below), the citizens wrote a letter to the editor of a local newspaper arguing that their data proved that the water supply is contaminated. They demanded immediate government action to address the problem. The local water board again tested the wells using their official water testing instruments and found average concentrations of 8.1 +/- 0.2 micrograms per liter. Assume the water board's reported measurements are the accepted value. The maximum permitted level of arsenic in water supplies is 10 micro-grams per liter. src="https://sciemce.com/media/4/ppg__1020817191133__f1q510g1.jpg" alt="" style="vertical-align: 0.0px;" height="119" width="470" /> Which of the earth-system scientist's roles is best illustrated by this paragraph?
A. Informing society
B. Use of earth resources
C. Alerting the public of natural hazards
D. Health of the environment