1. some volcanoes have explosive eruptions, like the one at mount st. helens in 1980. eruptions like these can cause abrupt changes to earth's surface.

which of these could result from an explosive volcanic eruption?
a) a flow of ash and debris rushes down the volcano's slope.
b) part of the volcano is blasted away.
c) volcanic ash covers the surrounding area.
d) all of these

Match the item to the definition: indirect correlation, correlational research, correlational research, covary, pearson correlation coefficient, pearson correlation coefficient, direct correlation a. used to describe the relationship between two or more naturally occurring variables b. determines whether scores on the two variables covary c. whether two variables vary or change together d. denoted by the symbol "r" e. provides information about the sign (direction) and magnitude(strength) of the linear relationship. f. when the correlation is positiveg. when the correlation is negative