Silver Burdett/

Science: Understanding Your Environment/

Using Heat Energy p. 157/

1975/

/

/

S4N14/

*****

/-/(In how many ways )do you use*D1 heat energy? /-/What would your life be*-1P like (without heat? )/-/You may not have*D1 answers ready (for those questions. )/-/Heat is*A1 so common [ARyou do not often think*- (about it. )]/-/Man did not invent*D1 fire. /c/But thousands=U--03 (of years )ago, he learned*D1I to use=IDO031 it. /-/Life today would be*A1 different (without fire and heat. )/-/There would be*N3 no automobiles, trains, or aircraft. /-/(Without fire and heat, )man could not have lived*- (on the earth. )/-/Look*- (around you )right now. /-/What objects were made*P (by using=GOP021 )heat? /-/Can you see*- (through glass windows? )/-/Do you see*D1 any brick buildings? /-/What metals have been used*P (in your classroom? )/-/Glass, brick, and metal objects are made*P (by using=GOP021 )heat. /-/There is*N1 much [JRyou should know*D0 (about heat. )]/-/How does heat affect*D1 materials? /-/Why does man depend*- so much (on heat? )/-/What is*N1 temperature? /-/This chapter will help*D1I you answer=IDO092 those and many other questions (about heat. )/-/You have felt*D1 heat many times.=U--02 /-/You have touched*D1 objects [ARwhen they were*A1 hot ]and [ARwhen they were*A1 cold. ]/-/What makes*D1I them feel=IDO031 different? /-/You might say*D1 "temperature." /c/But what is*N1 temperature? /-/You must know*D0 (about matter )to understand=IAV031 temperature. /-/Remember*D1 [DOthat anything [JMthat has*D1 weight and takes*D1 up space ]is*N1 matter. ]/-/Rocks, air, water, and plants are*N1 matter. /-/Your body is made*P (of matter. )/-/All matter is made*P (of very small particles. )/-/These small particles (of matter )are always moving,*- or vibrating.*- /-/[ALWhen matter is*A1 cold, ]its particles move*- slowly. !!!!!!!!