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1、Livingthingsandnon-livingthingsByYanzhiLvClass16Thedefinitionoflivingandnon-livingthingsLivingthingshavesevencharacteristicsbelowandnon-livingthingsdon’thaveallthecharacteristicsthatlivingshave.Characteristicsoflivingthings1.Livingthingscanmove.2.Livin
2、gthingscangrow.3.Livingthingscanbreatheandrespire.4.Livingthingscanreproduce.5.Livingthingscanrespondtostimuli.6.Livingthingscanexcretewaste.7.Alllivingthingsneedfoodtokeepalive.Livingthingscanmove.Manyanimalscanmovetheirbodiesfromoneplacetoanther.They
3、movebecauseofescapingdangerortryingtofindfoodorwater.Manybirdsmovefromoneplacetoantherbecauseofclimatechange.Humanbeingsalsomove,wecanwalk,dance,jump,andclimb.Someofuscanalsoswim.Plantsmovementisnotthesameastheanimals’,Plantcanmovepartoftheirbodiestoge
4、twhattheyneed.Livingthingscangrow.Alllivingthingscangrowtobebigandheavy.Aseedcangrowintoatreeandababycangrowintoachild.Livingthingscanbreatheandrespire.Mostlivingthingsneedairtokeepalive.Mostanimalswithbackbones,likehumans,birds,reptilesuselungstobreat
5、he.Fishesusetheirgillstobreathe.Mostoftheanimalswithoutbackbones,liketheinsects,shrimpsandmollusksuselungstobreathe.Theplantsbreathethroughtheirleaves.Livingthingscanreproduce.Alllivingthingscanreproduce.Animalsproducebabiesoreggsandplantsproduceseeds.
6、Thebabiesandseedsarecalledoffspring.Theparentanimalsandplantspassontheirfeaturestotheiroffspring.Withoutreproducing,humansandanimalscan’tlivegenerationaftergeneration,thesocietyandthenaturecan’tdeveloporbeimproved.Livingthingscanrespondtostimuli.Respon
7、dingtothestimuliistheknowledgeorabilitywhichallowsanimalsandpeoplenaturallytoactinparticularwayswithouthavingtothinkortobetaught.So,wheneverthereisastimulus,livingthingswillrespondtoitimmediately.Livingthingscanexcretewaste.Thewasteisharmfultothebody,s
8、oitisnecessarytoremovethewastefromanimals’bodies.Plantsalsoneedtoremovethewaste,youwillseetheleavesandbarkfallordropyearly.Alllivingthingsneedfoodtokeepalive.Weallknowthatfoodprovidesenergyforlivingthings.Withoutfood,livingthingswilldie
