Professor wong measures the intelligence and temperament of a group of preschoolers. he plans to study the same group of participants over time and collect data when the children are in grades 3, 6, and 9. this is an example of which type of research design?

This is an example of a longitudinal study.

Explanation:

Longitudinal studies usually aim to study the behavior of a variable over time, which is why the variable has to be studied in the same sample throughout the length of the study.

In this type of research design the researcher do fieldwork on several ocasions, in different points in time, i. e. every five years. Professor's Wong study has a longitudinal design because he aimes to study intelligence and temperament over time and he plans to study the same group of children every three years.

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)