Match each object to its definition. meteor
+
the remains of a rock from space that
strikes Earth's surface
meteoroid
a small piece of rock in space
meteorite
a rock that burns up in Earth's
atmosphere

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.

The us labor movement began in the a. 1930s b. 1920s c. 1880s d. 1860s select the best answer from the choices provided. a b c d

Name two factors that, "power of magnetic field " of earth.