For a rotating column of air connected to a storm cloud to be
considered a tornado, it must do
which of the following?
A. reach speeds of at least 300 kilometers per
hour
B. last for over 15 minutes
C. make contact with the ground
D. occur during the day

What is the difference between an igneous, sedimentary and metamorphic rock

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.

Warmer ocean surface water would most likely be found near