Discuss the differences between a manipulative experiment and a natural experiment
What will be an ideal response?
In a manipulative experiment, the researcher chooses and manipulates the independent variable while controlling for the effects of other variables, but in a natural experiment the researcher records differences in variables as they are expressed in the natural environment, such as the mean weight of tomatoes grown in dry versus wet climates. In such experiments, the independent variable varies naturally, and effects of other variables are not necessarily controllable.
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An aqueous solution is a mixture of
A. nonpolar molecules dissolved in a polar solvent B. water dispersed in an ionic compound C. some compound dissolved in water D. polar molecules dissolved in a nonpolar solvent E. none of the above
Compared with other fundamental forces, the constant G shows gravity to be a relatively
A. strong force. B. novel force. C. weak force. D. extremely strong force.
Of the following, which is most relevant to weather?
A) water B) rock C) carbon dioxide in the atmosphere D) particles in suspension in the atmosphere E) methane in the atmosphere
Which of the following is not a problem associated with computer simulations in geology?
A) Assumptions and simplifications must be used. B) Computers cannot calculate quickly enough to make up for the vast time span involved in geologic processes. C) Computers may not have enough memory to account for all the necessary variables in the calculations. D) Mathematical formulas are an uncertain way to measure the real-world phenomena.