1) What is a description of atmospheric conditions over a long period of
time?

Most weather phenomena occur in the lowest level of the atmosphere, the troposphere, just below the stratosphere. Weather refers to day-to-day temperature and precipitation activity, whereas climate is the term for the averaging of atmospheric conditions over longer periods of time.

this is math not biology xd

2%? i tried finding the exact sorry if it's not 100% correct ; -;