When compared to an earthquake with a magnitude of 3, an earthquake with a magnitude of 4 has a seismic wave times larger and a fold increase in seismic energy

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

Where is the world’s shortest commercial runway?

Name the two rivers that run through the fertile crescent. how were the rivers both positive and negative to societies of the fertile crescent?