________ emits mainly ________ which is in the ________ portion of the electromagnetic spectrum.
A) The Sunshortwave radiationradio wave
B) Earthlongwave radiationinfrared
C) Earthlongwave radiationultraviole t
D) The Sunlongwave radiationinfrared
E) Earthshortwave radiationvisible
Question 2
Why are air mass thunderstorms most likely to occur in the midafternoon?
A) Water-vapor contents are too low at night.
B) Upper-level winds are too fast at night and in morning.
C) Atmosphere is most unstable at that time.
D) It takes all day for them to mature.