One of the disadvantages of using participant observation as a research method is:

Intermediate- and deep-focus earthquakes occur almost exclusively at

McKinley does not like Parker, but McKinley treats Parker in an excessively friendly manner. Freud would say that McKinley is using the defense mechanism, ________.

Two minerals—alabandite and pyrolusite—are both black, but alabandite is green in its powdered form, whereas pyrolusite is black in its powdered form. A geologist would say that they differ in

The longer arrow in the figure represents a(n)

At a minimum, how many seismograph stations are necessary to locate the epicenter of an earthquake?

Grains gradually become more rounded, as shown in the diagram (moving from left to right), primarily during

What causes the most common chromosomal abnormality, called Trisomy 21?

This question is worth 3 multiple choice questions and contains two parts (partial credit possible).  In complete sentences answer: Part 1: What is weathering? Part 2: Explain the difference between chemical and physical weathering.  

Suppose a group of researchers wants to investigate the relationship between daily mindfulness meditation and cortisol (stress hormone) levels in the body over a 20-year time period. Which research design would allow them to measure changes with age and within individuals over time?