Choose all the answers that apply. Cold air:

is less dense than warm air
holds more water vapor than warm air
sinks
rises
holds less water vapor than warm air
is more dense than warm air

Cold air IS less dense, sinks, holds less vapor

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!