When soho observes a coronal mass ejection heading for earth, how long do we usually have to prepare earth-based and satellite systems for the coming solar storm?

a. 8-9 minutes b. less than one day c. 3-5 days d. one month

Mexico has a host of environmental problems, including significant chemicalpollution  from factory discharges and waste dumping, but the main threat to itsbiodiversity  probably stems from  deforestation  and other natural habitat losses. forest habitat is lost for a number of reasons

Aristotle thought so every portion of the earth tends toward the center until by compression and convergence they form a sphere. travelers going south see southern constellations rise higher above the horizon.~ hope this !