Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is pushed over the warm air, usually producing thunderstorms. The warm air rises through the colder air, causing an updraft. The updraft will begin to rotate if winds vary sharply in speed or direction1
Answer:
Pluto
Explanation:
it wasn't discovered until the 20th century by Clyde Tombaugh
Answer:A. The swine flue was a raging fire
Explanation: A metaphor is a similie without using like or as.It is comparing the flue to a raging fire.
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Answer:
constructive plate boundaries cause volcanoes.
Explanation:
the answer to this question is b because i just took the test