Earthquakes occur mostly
a. in the middle of continents.
c. at plate boundaries.
b. in the asthenosphere.
d. at the edge of a continent

Discuss how relative and absolute dating are used to assign ages to rocks. specifically, how are the two dating methods different from each other? discuss the technique of absolute dating commonly used to date rocks.

Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

The impact of a large asteroid comet with earth has been proposed to have caused the extinction of the dinosaurs. the impact site of this comet is in or near