Weegy: According to the principle of cross-cutting relationships, if an igneous intrusion cuts across a layer of schist, the igneous intrusion is younger than the schist. (More)

Weegy: The largest mass extinction event in the history of the Earth occurred at the end of the PERMIAN period. (More)

Weegy: Differentiation is the process in planetary formation when heavy materials sink toward the planet's center and lighter materials accumulate near its surface. (More)

Weegy: Fusion occurs in the core of the Sun, where the pressure and temperature are very high. (More)

Weegy: Mercury has the largest day-night temperature difference. (More)