science (தமிழ்) Gr7

1. kl;/thior;Nrid ,e;Jf;fy;Y}up
Mf;fk;
Nf. yJu;~d;.
juk; : 7H

2. myF :
06. rf;jp Ntiy kw;Wk; tpiria
tpidj;jpwDld; gad;gLj;Jjy;.
ghlk; :
tpQ;Qhdk;

3. 6.1 tpiria gaDWjp kpf;f tifapy;
gad;gLj;Jjy;.
tpir vd;gJ js;SjYk; ,Oj;jYk; MFk;.
tpiria gad;gLj;Jk; re;ju;g;gq;fs;.
• fjit jpwj;jy; / %Ljy;.
• fl;biy mirj;jy;.
• thfdj;ij ghij Xuj;jpy; epWj;Jjy;.
• [d;diy jpwj;jy; / %Ljy;.
• nghUnshd;iw mirj;jy;.
• fjpiuia NkirapDs;Ns js;Sjy; ,Sj;jy;.
K. Lathurshan Grade 7

4. tpiria msf;Fk; myF.
tpiria msg;gjw;fhd ru;tNjr myF epåw;wd;
MFk;.
,J N vDk; Mq;fpy vOj;jhy; Fwpf;fg;gLk;.
tpiria mstplg; gad;gLk; juhR epåw;wd;
juhR vdg;gLk;.
 ,j;juhR RUs;tpy;ypdhy; Mf;fg;gl;Ls;sJ.
K. Lathurshan Grade 7

5. tpiria gpuNahfpf;Fk;NghJ ftdj;jpw;
nfhs;sNtz;ba fhuzpfs;.
tpirapd; gUkd;
 nghUs; xd;W ,aq;Ftjw;F NghjpasT gUkd; cs;s
tpir Njit.
 NghjpasT tpir ,y;yhjNghJ ,af;fk; Vw;glhJ mjhtJ
mq;F Ntiy nra;ag;gltpy;iy.
 Nkir kPjpUf;Fk; 60kg jpzpTs;s nghUspd;
,af;fk; gw;wpr; rpe;jpj;Jg;ghUq;fs;.
K. Lathurshan Grade 7

6. tpirapd; jpir
ntt;NtW jpirfspy; vk;khy; tpiria gpuNahfpf;f
KbAk;.
MapDk; ,af;fk; eilngWk; jpirapy; tpiria
gpuNahfpj;jhy; kpfg; gaDs;sjhFk;.
 xU nghUs; kPJ ntt;NtW jpirfspy; tpiria
gpuNahfpj;J Vw;gLk; tpisTfis mwpe;J
nfhs;Nthk;.
njd;fpof;F
K. Lathurshan Grade 7

7. tpirapd; gpuNahfg;Gs;sp
tpirf;F mJ njhspw;gLk; gpuNahfg;Gs;sp
cs;sJ.
xU nghspd; kPJ xNuasthd tpiria ntt;NtW
gpuNahfg;Gs;spfspy; gpuNahfpj;J Ma;T
nra;Nthk;.
A,B,C vDk; Gs;spfspy; 100N tpiria
gpuNahfpj;J eilngWtij mtjhdpg;Nghk;.
K. Lathurshan Grade 7

8. gytpj tpirfSk; mtw;wpd;
gpuNahfq;fSk;
fw;wypd; nghUl;L nghUl;fSf;fpilapy;
cUthFk; tpirfis ,U njhFjpfshfg;
gpupf;fyhk;.
mit njhLif tpir, njhLifapy; [njhiyT] tpir
vd;gdthFk;.
K. Lathurshan Grade 7

9. njhLif tpir
,uz;L nghUl;fs; ngsjPf epiyapy;
xd;Nwhnlhd;W njhLifapYs;sNghJ
xd;wpypUe;J xd;iw tpyf;f Kaw;rf;Fk;
tpirfs; njhLif tpirfs;[Contact force]
vdg;gLk;.
,tw;Wf;F cjhuzq;fshf fzj;jhf;F tpir, cuha;T
tpir, ,O tpir, mKf;f tpir, [cijg;G] Mfpatw;iw
$wyhk;.
K. Lathurshan Grade 7

10. fzj;jhf;F tpir
xU nghUs; kPJ ,d;ndhU nghUspdhy;
kpff;Fwfpa Neuj;jpy; gpuNahfpf;Fk; tpir
fzj;jhf;F tpirahFk;
 fzj;jhf;F tpirapdhy; vkf;F gaDk; cs;sJ
jPq;Fk; cs;sJ.
K. Lathurshan Grade 7

11. fzj;jhf;F tpir gad;gLk; re;ju;g;ge;fs;
re;ju;g;gq;f
s;
gad;gLj;jpa fzj;jhf;F
tpir
gad;ghL
fUq;fy; ciljy; Rj;jpayhy; fy;iy ciljy; fy; cile;J
Nghjy;
kz;iz mOj;Jjy; Gtp kPJ mjpu;it
Vw;gLj;Jjy;
kz; gilahjy;
K. Lathurshan Grade 7

12. cuha;T tpir Vw;gLk; re;ju;g;ge;fs;
re;ju;g;gq;fs; cuha;T
mjpfupj;jy;/Fiwjy;
ghijfspy; nry;Yk;
thfdq;fs;
rpy;ypdJk; ghijapdJk;
cuha;T mjpfupf;fg;gl Ntz;Lk;
nghwp xd;wpd;
gFjpfs; rPuhf
,aq;Ftjw;F
gFjpfSf;fpilNa cuha;T
Fiwf;fg;gl Ntz;Lk;
K. Lathurshan Grade 7

13. Nkw;gug;gpYs;s nghUs;kPJ mk;Nkw;gug;Gf;F
rkhe;jukhf tpir xd;WgpuNahfpf;fg;gLk; NghJ
Nkw;gug;ghdJ vjpu;j;jpirapy; tpir xd;iw
cUthf;Ffpd;wJ. ,e;j vjpu;tpir cuha;T tpir
vdg;gLk;.
nghUs; xd;iw mirf;f Ntz;Lnkdpy; gpuNahfpj;j
tpirahdJ cuha;T tpirapYk; $bajhf ,Uf;f Ntz;Lk;.
,af;fnghd;iw Muk;gpg;gjd; nghUl;L
gpuNahfpf;fg;gLk; tpir,cuha;T tpirf;Fr;
rkkhdjhfTk; vjpuhdjhfTk; ,Uf;f Ntz;Lk;.
K. Lathurshan Grade 7

14. gytpj re;ju;g;gq;fspy; cuha;T tpiria
mjpfupj;jy; Fiwj;jy; Mfpatw;wpd; mtrpaj;ij
mwpe;J nfhz;Bu;fs;.
cuha;T tpiria mjpfupf;Fk; nghUl;L my;yJ
Fiwf;Fk; tifapy; gy rhjdq;fs; mike;Js;sd.
cuha;it Fiwf;Fk; tifapy; fuk; gyifapy; gTlu;
,Ljy; Fz;Lg; nghjpfis ,Ljy; fpwP]; ghtpj;jy;
cuha;T ePf;fp vz;izahy; Nkw;gug;ig
xg;gkhf;Fjy; Nghd;w nraw;ghLfs;
mike;Js;sd.
K. Lathurshan Grade 7

15. cuha;T tpiria Fiwg;gitAk; $l;LgitAk;
$l;Lgit
Fiwg;git
K. Lathurshan Grade 7

16. ,Oit tpir
xU ,wg;gu; gl;bia my;yJ ,ioia my;yJ
Nfhiy ehk; ,Of;Fk; NghJ mt;tpirf;F vjpuhf
Xu; vjpu; tpir cUthf;fg;Lfpd;wJ.
cUthf;fg;gl;l ,t;tpirapdhy; ,g;nghUl;fs;
kPz;Lk; gioa epiyf;Fr; nry;y KaYk; ,t;thW
,ioapy; my;yJ ,wg;gu; gl;bapy; my;yJ
Rusp tpy;ypy; cuthf;fg;gl;l vjpu; tpir ,Oit
[Tension] tpir vdg;gLk;.
K. Lathurshan Grade 7

17. cijg;G
xU nghUs; kPJ ,d;ndhU nghUs; tpiria
gpuNghfpf;Fk; NghJ ,uz;lhtJ
nghUspdhy; KjyhtJ nghUs; kPJ
vjpu;j;jpirapy; tpir xd;W nraw;gLk;. ,t;tpir
cijg;G tpir vdg;gLk;.
K. Lathurshan Grade 7

18. ed;wp
K. Lathurshan Grade 7