Hoqt dpng 1: Tim hidu cof quan tieu hoa d dpng vat an thuc vat
Muc tieu: HS neu dugc dac diem cau tao co quan tieu hoa phia hgp vdi che' dp an
cua nhdm dpng vat.
Hoqt dpng cua GV - GV treo ttanh he tieu hoa
cua bd, tho va chim - GV yeu c^u:
+ Quan sat tranh hinh chu y d CO quan nhu mipng, da day, rupt.
+ Hoan thanh cac ndi dung trong phieu hpc tap sd 1.
- GV cd thd ehieii phieu hpc tap cua mdt sd nhdm dd ldp ciing thao luan.
- GV nhan xet danh gia. - G V thCng bao dap an dung.
Hoqt dpng cua HS
- HS hoat dpng nhdm.
+ Mdi ca nhan nhan biet va ghi nhan kie'n thdc.
+ Thao luan nhdm.
+ van dung kie'n thiic sinh hoc d cdc ldp dudi.
+ Hoan thanh cae npi dung cua phie'u hpc tap.
- Dai dipn nhom trinh bay
dap an -^ ldp nhan xet.
-> Cac nhdm theo ddi va sira chiia.
Npi dung
DAP AN PHIEU HOC TAP SO 1
Mieng
Da day
Dpng vat nhai lai - Ham khdng c6 rang ciia va rang nanh. - Chi cd rang ham vdi be mat rpng va nhieu nep, men rSng cCmg. - To, cd 4 ngan: da CO, da td ong, da la Dpng vat co da day ddn (tho) - Bp rang cd 6^ 3 loai nhimg khdng nhpn, rang ham to. - Nho, chi c6 1 ngSn gdm 2 phan: thugng vj
Dong vat an hat (chim) - Khdng co rang. - Chi cd mo bpc sCmg demo thiic an.
- Ludi hoa si^g. - G d m 2 ph^n: + Da day tuyen tiet
Rupt
sach, da miii khe.
- Dai, to gdm 2 phan: la rupt non va rupt gia.
va ha vj. -
- Dai, giijra rupt non va rupt gia co manh trang Idn, c6 nhieu ndp xoan la ndi tieu hoa xeluldzo. - Rupt thing:trii phan, hap thu lai nUdc trong phan.
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+ Da day co co vach cd day.
- Nho, dai, manh trang khdng phat trien.
- Rupt gia khdng phan hoa thanh rupt thing khdng c6 noi trCfphan.
Hoqt dpng cua GV
~ GV neu eau hoi thao luan:
+ Tai sao he tieu hoa cua nhdm dpng vat an thuc vat cd da day to khoe va rudt dai?
+ Ca'u tao he tieu hoa cua nhom dpng vat an thuc vat khac ddng vat an thit d didm nao? Didu dd co y nghia nhu th^ nao?
- GV yeu c^u HS khai quat kie'n thiic vd dac didm thiic an cua nhdm dpng vM an thuc vat.
Hoqt ddng cua HS - HS thao luan nhdm dua
vao kie'n thiic trong phieii hpc tap va kieh thdc d cac ldp dudi.
- HS neu dugc:
+ Da day to, khoe va rudt dai la do dac didm cua thiic an.
+ Dac didm khac vdi dpng vat an thit: do la bp rang, da day va ruPt
Su khae nhau thd hipn hai hudng thich nghi vdi che dp dinh dudng khac nhau. - HS tdng hgp va khai quat kie^n thiic.
Npi dung
* Ddc diem thiic dn thUc vat - Thanh ph^n chu ydu la
xenluldzo, dam, lipit, cac thanh ph^n khac ra't it. - Lugng thdc an phai nhieu mdi du cung cap cac chat cho CO thd.
Hoqt dpng 2: Tim hidu ti^u ho^ of dpng vAt an thuc v$t
Muc tieu:
- HS nam dugc qua trinh tieu hoa d cac nhdm dpng vat an thuc vat.
- Trinh bay dugc bie'n ddi thiic an thuc vat d cac nhdm dpng vat nay trong dd luu y tdi bie'n ddi sinh hpc.
Hoqt dpng cua GV - GV yeu clu cac nhdm
lap bang so sanh bien ddi CO hpc d mieng, da day cua cac nhom dpng vat an thuc v4t.
- GV dd cac nhdm trao ddi, nhan xet.
- GV danh gia k^t qua va thong bao dap an diing.
Hoqt dpng cua HS
- Ca nhan nghien cuu tranh
hinh va van dung kien thiic sinh hoc d cac ldp dudi phat hipn kie'n thiic.
- Thao luan nhdm thdng nh^t y kie'n.
- Yeu cin neu dugc: (adsbygoogle = window.adsbygoogle || []).push({});
+ Dac didm nhai lai va khSng nhai lai:
+ Nghidn thiic an d da day va khong nghidn thiic an. - Dai dien nhdm viet dap an dudi dang bang so sanh len bang dd ldp nhan xet. - Cae nhdm tu sira chiia.
Npi dung
Mieng
Da day
6 dpng vat nhai lai - Dung ludi giat co, khdng - Dung ludi giat co, khdng nhai hoSc nhai qua loa, nudt vao da co.