Dr. Willard is attempting to assess 5-year-old Scott's ability to solve a balance-scale problem. Dr. Willard has predicted that Scott would use Siegler's first rule. In doing so, Dr. Willard expects that Scott will ask himself,

A. "What does balance mean?"
B. "Are there the same number of weights on each side of the scale?"
C. "Are the weights the same distance apart?"
D. "Is the greatest number of weights on the same side as the weight the greatest distance from the center?"

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a study of twenty 4th grade classrooms in which researchers ask the schools to systematically vary the time of day reading is taught, and collect weekly assessments of reading comprehension for each child over a three-month period. the collection of data, by a playground designer hired by the superintendent of schools, about the physical dimensions of school playgrounds, presence of fencing, and the kinds of equipment currently provided. a feasibility study for implementing a year-round school program, focusing on economic issues such a facilities utilization and transportation costs. an analysis of aggregate data comparing statewide high school graduation rates provided by the state department of public instruction, using county tax information.

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

Explain the correlation between industrialization and urban areas