Nm Clss D C 5 Puls S 5 1 Hw Puls Gw (s 119 123) Ts s fs ss us sb ul. I ls sbs fs ff ul sz xls w xl w ls w. Css f Puls ( 119) 1. W fu m ss f ul?. G sbu. Gw b. Ds. A suu 2. W s ul s sbu? I s b b ul. 3. A m f sbu s. 4. W s ul s? I s umb f vuls u. 5. W s qu w w u lul ul s? Pul s = Numb f vuls U Pul Gw ( 120) 6. Cl l f s s u bu uls.. T w l. b. T s sz.. T m s sm sz fm.. T s sm sz ul s. 7. W fs ff ul sz?. T umb f bs b. T umb f s. T umb f vuls lv ul 8. If m vuls b f m, w wll ul? I wll w. 9. Cml bl bu s ul. CHANGES IN POPULATION T f C Df Rsul C Sz Ps Eu, I. All s sv. Imm T mvm f vuls T ul ws Em T mvm f vuls u f T ul ss 46 Gu R Su Wkbk/C 5
Nm Clss D Exl Gw ( 121) 10. Hw wll ul f s bu s f f ul s fm s ss? T ul wll mull, ul sz wll s. 11. W s xl w u? I us w vuls ul u s. 12. W ws w m b s, xss? I m b s s ubl m, b fml, f w. 13. U l s w ulm sus, w wll ul w? Su ul wul w xll. 14. Cml b w s s f xl ul w. Exl Gw f Bl Pul 300,000 Numb f B 200,000 100,000 0 0 2 4 6 Tm (us) Ps Eu, I. All s sv. 15. Is fllw s u fls? Els v w xll bus f u s s slw. fls Ls Gw ( 122) 16. Cl s s u bu xl w.. I us ul sm vs l. b. I us sm s sus bm lss vlbl.. I s u ul uls f v l.. I us ul uls ul b ss. 17. W sus bm lss vlbl, w s ul w? I slws ss. Gu R Su Wkbk/C 5 47
Nm Clss D C 5, Puls (u) 18. W s ls w u? I us w ul s w slws ss fllw f xl w. 19. Cl l f s w ul s w wll slw w.. T b sm. b. T b s.. T f mm s qul f m.. T f m s lss f mm. 20. W s f vm f ul ss? I s ls umb f vuls v vm su. 21. Cml b w s s f ls ul w. Ls Gw f Ys Pul C Numb f Ys Clls Tm (us) Ps Eu, I. All s sv. 48 Gu R Su Wkbk/C 5
Nm Clss D S 5 2 Lms Gw (s 124 127) Ts s sbs w fs lm ul w. Lm Fs ( 124) 1. W s lm f? I s f uss ul w s. 2. A lm u s xml f lm f. Ds-D Fs. (s 125 126) 3. W s s- lm f? I s lm f s ul sz. 4. W s- fs bm lm? ul s s lvl. T bm lm l w 5. W s- fs ms sl? w ul s l s. T ms sl 6. W fu s- lm fs?. Cm. Pssm b. P. Dss 7. W uls bm w, w sms m w f? T m f f, w, s, sul, ssls f lf. Ps Eu, I. All s sv. 8. T msm f ul l w ul s ul b s ll () - ls. 9. W w s - ls Isl Rl? T ms, s wlvs. 10. W s wlf ul Isl Rl l fllw l ms ul? T wlf ul ls bus s lss f wlvs f u. 11. Hw ss lk s? Lk s, ss k usm xs f ss, f wk m us ss. Ds-I Fs ( 127) 12. A lm f ffs ll uls sml ws, lss f ul sz, s ll () s- lm f. Gu R Su Wkbk/C 5 49
Nm Clss D C 5, Puls (u) 13. W xmls f s- lm fs? Exmls lu uusul w, ul sss, ssl ls, um vs, su s mm vs l-u fss. 14. Cl l f s s u bu s us b s fs.. Ms uls mu f. b. P us ff uls f sss.. Puls v bul u f s ul sz.. Mj uss ssm l l-m ls uls. 15. W s s ss ul sz f m ss s- lm f? T ul sz sll ss. R Skll P A l u us mss f l. B lk full xbk, u l uslf us b w u v. Lk full Fu 5 7 126. W m s s mmu? T sws s ul f ss, ul f ss, v vs. Ts l f uls b fl. Ps Eu, I. All s sv. 50 Gu R Su Wkbk/C 5
Nm Clss D S 5 3 Hum Pul Gw (s 129 132) Ts s sbs w sz f um ul s v m. I ls xls w ul w s ff us uu wl. Hsl Ovvw ( 129) 1. Hw s sz f um ul w m? m. I s s w 2. W ul w slwl f ms f um xs? lm fs k ul szs lw. Lf ws s, 3. Cl l f s w um ul b w m l bu 500 s.. Imv s l u. b. Ius m lf s sf.. T wl s f sul bm m lbl.. Bs ms ls m lw. Ps f Pul Gw (s 130 131) 4. W um ul k w xll fv? sus lm. E s 5. W s m? I s sf su f um uls. 6. W fs l w uls f sm us w fs s? Fs lu bs, s, suu f uls. Ps Eu, I. All s sv. 7. T ss xls w ul w s slw mll U Ss, J, mu f Eu s ll m s. 8. Tuu mu f um s, w v b lvls f bs s um ss? Hum ss v bs qull s. 9. W fs lw? Avs u, s, m lw. Gu R Su Wkbk/C 5 51
Nm Clss D C 5, Puls (u) 10. Is fllw s u fls? Pul w s,, w m l f ff s mk u v ul. u 11. Cml flw bu m s. 12. Cl l f s s u bu um ul w. Cs bu bu b mz lw. Bs l x s, sul ul ss. As mz us, b flls ul w ss. T b flls m, ul w ss.. T m s s ml C I. b. T wlw um ul s sll w xll.. Ms l lv us v ml m s.. T m s s U Ss. 13. W -suu ms? ff us ul. T umbs f vuls 14. W suus f U Ss f Rw bu ul w f u? T suu U Ss s slw bu s w f fuu. T suu Rw s ul wll ubl bu 30 s. Fuu Pul Gw ( 132) 15. B 2050, wl s ul m w m l? I m m 9 bll l. 16. W m us w f wl ul lvl ff v slw w? T m f us ul w l mv w m s. Ps Eu, I. All s sv. 52 Gu R Su Wkbk/C 5
Gu R Su Wkbk/C 5 53 Ps Eu, I. All s sv. Nm Clss D 17. W m lss sus wll f w um ul s slw w? T ul b sus m vm s wll s lbl m. WWs Us lus l u w vbul ms fm C 5 blks. T, u umb ls f sw l. W k f lm f s ul sz? 1 W us w vuls ul u s? 2 W s mvm f vuls ll? 3 4 W us w ul s w slws ss fllw f xl w? 5 6 W s msm f ul l w ul s ul b? 7 8 W s f ul sf fm b s lw b s ll? 9 W s ls umb f vuls v vm su ll? 10 Rl: W s sf su f um uls ll? Asw: 1 2 3 4 5 6 7 8 9 10 m s m s l w s l m m w l x s