List several of water's unique properties
What will be an ideal response?
Water naturally occurs in all three strates on the Earth; the covalent bonds of hydrogen and oxygen are difficult to separate; the nature of the hydrogen-oxygen bond gives the hydrogen side of water molecule a positive charge and the oxygen side a negative charge. This polarity results in water molecules attracting to one another (cohesion). Water also attaches to other substances (adhesion). Water is also able to dissolve many substances. Water has high surface tension and capillarity. When water cools, it contracts and increases in density until it reaches 4°C (39°F), below which it expands and becomes less dense. Etc.
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Compared to most stellar objects, quasars are more
A) distant. B) energetic. C) puzzling. D) all of these E) none of these
An equivalent, alternative term to Hispanic is
A) Chicano/Chicana. B) Latino/Latina. C) Mexican. D) Spanish. E) Spanish American.
In 1960 the ratio of food production to N fertilizer use was 40:15 or 2.7:1. By 2000 the ratio was 1:1. The efficiency of N use in agriculture _____.
Fill in the blank(s) with the appropriate word(s).
Changes in the amount of forest in the area included in the Investigation could cause changes to
A) the hydrologic cycle. B) erosion of soil. C) diversity in the local forest ecosystems. D) the amount of sunlight reaching the ground. E) All of these choices are correct.