Summarize how the weather changed in Louisville, KY, from April 20 to April 21. What type of air mass was over Louisville on April 20? On April 21? Include the changes in temperature, dew point temperature, wind direction, and air pressure.

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays