Bella is designing a model of a longitudinal sound wave for her science classroom. Which of the following pieces of information should Bella include in her model? Choose the two statements that apply.
A. Sound must travel through a material to transfer energy.
B. Sound must travel through a vacuum to transfer energy.
C. Rarefaction and compression are properties of longitudinal waves.
D. Crests and troughs are properties of longitudinal waves.

The movement of tectonic plates in two different locations is shown below: two blocks labeled location a and location b are shown. at location a the top layer of the block shows two horizontal arrows pointing towards each other. small dunes are shown in the middle between the two arrows. the block labeled b has a vertical line in the middle. on the left of the line there is an arrow pointing down. on the right of the vertical line there is an arrow pointing up which statement is most likely true? subduction may occur in both locations. earthquakes may occur in both locations. subduction may occur in location a only and a volcanic eruption may occur in location b only. an earthquake may occur in location a only and a volcanic eruption may occur in location b only.

What effect does plate tectonics have an organic evolution

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain