During which chinese dynasty were foreign rulers overthrown?

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

Which factors add to the greenhouse effect and are caused by human activities?

The layers of earth are based on what two sets of characteristics?