1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) 1,000,000,000 periods per second 2) a period marked by distinctive character or reckoned from a fixed point or event 3) apparent power to perceive things that are not present to the senses DOWN 1) a unit of force equal to the force exerted by gravity; used to indicate the force to which a body is subjected when it is accelerated 2) a period of time equal to 1/24th of a day 3) a sudden event that imparts energy or excitement, usually with a dramatic impact ** Scroll down for solution. ** Are you sure you want to peek? ghz era esp