Silver Burdett/

Science: Understanding Your Environment/

Transportation in Air and Space p. 95/

1975/

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S4N9/

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/-/Air and space travel are*N1 part (of life )today. /-/Some people do not work*- (in just one place. )/-/They may need*D1I to be=IDO080 (in a different city )each day.=U--02 /-/People could not do*D1 this (without air travel. )/-/Aircraft can travel*- faster (than automobiles or trains. )/-/They travel*- hundreds=U--03 (of miles )(in an hour. )/-/Planes do not need*D1I to follow=IDO052 roads or tracks. /-/Pilots can fly*D1 the safest and shortest routes (between places. )/-/You and space travel are*N1 about the same age. /-/The first man traveled*- (in space )(in 1961. )/-/Man first stepped*- (on the moon )(in 1969. )/-/This was*N1 the first trip (by men )(to another body )(in space. )/-/Air and space travel probably will be*N1 an important part (of your life. )/-/Each year=U--02 more people travel*- (by air. )/-/[ALWhen you grow*- up, ]you may fly*- (to work )each day.=U--02 /-/A few (of you )may even travel*- (in space. )/-/Travel (in air )is*A1 different (from travel )(in space. )/-/[ALSince both take*D1 place (above the earth, )]they may seem*A1 alike. /-/You have studied*D1 air before. /-/You know*D1 [DOthat air is*N1 matter. ]/-/It has*D1 weight and takes*D1 up space. /-/You can feel*D1 most kinds (of matter. )/-/Have you ever felt*D1 air? /-/You know*D1 [DOthat moving=P--01 air is called*P1 wind. ]/-/You also know*D1 [DOhow it feels.*- ]/-/Wind can make*D1I other objects move.=IDO030 /-/It can move*D1 tree leaves. /-/It can blow*D2 paper and dirt (on sidewalks and streets. )/-/These objects move*- [ARbecause they are pushed*P (by moving=P--01 air. )]/-/Strong winds can be*A1 harmful. /-/They can push*- hard enough to break=IAV031 trees and wreck=IAV031 buildings. !!!!!!!!