Answer:
it means that student is running 8meters per second
Cold ocean water flows from the north pole towards south and affects the climate locations near the Atlantic Ocean.
Global warming is heating up their environments and melting away their glacier habitat. If their home ever got completely rid of ice they'd die of a heat stroke.
An asteroid hitting the earth would cause a lot of dust, ash, and other debris to go into the atmosphere which would block the sun which would cause the temperature to decrease.