Scientists can observe primary productivity in the ocean from space by measuring the ____

A) temperature of the surface water
B) depth of the euphotic zone
C) amount of chlorophyll in surface waters
D) salinity of surface waters


C

Environmental & Atmospheric Sciences

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Why do scientists formulate principles?

A) to describe a widely applicable and generally accepted explanation for natural phenomena B) to explain something that cannot be observed or measured by scientific procedures C) to make a statement or mathematical formula that always succeeds in generalizing data and observations about data without necessarily offering an explanation D) to explain a problem that accounts for existing data and predict additional phenomena that should exist

Environmental & Atmospheric Sciences

How does a suspension differ from a solution?

A. Although a solution and suspension are both homogeneous mixtures, only the components of a suspension will separate by spinning the mixture in a centrifuge. B. A suspension is a heterogeneous mixture consisting of different phases, whereas a solution is a homogeneous mixture consisting of a single phase. C. A suspension is a heterogeneous mixture whose components can be separated by simple filtration. A solution is a homogeneous mixture which cannot be separated by simple filtration. D. The difference between a suspension and a solution can only be determined by chemical means.

Environmental & Atmospheric Sciences

In comparison to an ocean basin, the crustal root of a mountain range is:

a. deep and very dense b. deep and of lower density than the surrounding rocks c. shallow and very dense d. shallow and of lower density than the surrounding rocks

Environmental & Atmospheric Sciences

Acid precipitation is especially disruptive when it occurs in areas with ________ because of the lack of ________.

A. Limestone in the soil; buffering capacity B. Crystalline bedrock; buffering capacity C. Alkaline soils; acid resistant mosses D. Alkaline soils; buffering capacity E. Crystalline bedrock; acid resistant mosses

Environmental & Atmospheric Sciences