When a comet is observed for the first time, astronomers enter information about its position, size, and motion into computer simulations in order to

A.
analyze it for animal life.

B.
measure the length of its tail.

C.
predict its orbital path.

D.
estimate its brightness.

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous