Students are investigating the types of rocks found in various locations throughout california, the state where they live and attend school. what hypothesis might the students formulate to guide their research on rock formation, given that they live in california?
a) if volcanoes are the source of land masses in california, that most of the rock in the state should be igneous.
b) if california is the site of several plate boundaries, we would expect to see mostly metamorphic rock at the boundary sites.
c) if there is movement at plate boundaries and sediment is the result of erosion, then we would expect to find mostly sedimentary rock at plate boundaries.
eliminate
d) because there are mountainous regions in california and sedimentary rock is the result of erosion, we would expect to find mostly sedimentary rock in california,

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.