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environmental science chapter 2 QUIZ
Terms in this set (15)
Consider the controlled experiment on runoff from forested and deforested valleys as discussed in the Core Case Study in your text. What were the results?
Runoff in the deforested valley increased and eroded soil.
A scientific theory is ____.
a well-tested and widely accepted scientific hypothesis.
After scientists analyze data from an experiment, they can propose a(n) _____ to explain the data.
Science which consists of data, hypotheses, models, theories, and laws widely accepted by all or most of the scientists who are considered experts in the field under study is called _____.
Because scientists cannot actually precisely measure a process like soil erosion over the entire earth, they must ____.
use statistical sampling and mathematical models to produce estimates.
The number of ____ in an atom determine which element it is.
Combinations of two or more different elements held together in fixed proportions are known as _____.
The acidity of a solution is based on the comparative amounts of hydrogen ions and _____ ions.
Which formula correctly identifies sulfuric acid?
When coal is burned completely in a power plant, the solid carbon in the coal combines with oxygen gas from the atmosphere to form carbon dioxide. What type of change is this?
An atom with a net positive or negative charge resulting from the loss or gain of electrons is known as a(n):
Water flowing through a hydroelectric dam is an example of _____ energy.
The second law of thermodynamics states that whenever energy is converted from one form to another in a(n) _____ change, we end up with _____ energy than before.
physical or chemical; lower-quality
If you burn a chunk of wood, some of the _____ energy within the wood will be converted to ____ energy.
A negative feedback loop ____.
causes a system to change in the opposite direction from which it is moving.
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