Bai 42 Lop Hai La Mam Va Lop Mot La Mam

CHAO MNG CAC THY C N D GI

LP: 6

MN: SINH VT

Kim tra bai cu

Xc nh cc kiu r, thn, gn l, ht cc hinh sau:

Tun 27

Tit 53

Bai 42. LP HAI LA MM VA LP MT LA MM

I/ Cy hai la mm va cy mt la mm

Quan st tranh v mu vt hon thnh bng sau:
Tn cyRThnKiu gn l- Co mn tru Da cn- R qut La- Ng- Rau ma- Bng- i.................

Tn cyRThnKiu gn l- Co mn tru- Chum- Co- Song song Da cn- Cc- C- Mng- R qut- Chm- C- Song song La- Chm- C- Song song- Ng- Chm- C- Song song- Rau ma- Coc- Bo- Mng- Bng- Cc- G- Mng- i- Cc- G- Mng........................

X

X

X

X

X

X

X

X
Tn cyRThnKiu gn lThuc lpMt l mmHai l mm- Co mn tru- Chum- Co- Song song Da cn- Cc- C- Mng- R qut- Chm- C- Song song La- Chm- C- Song song- Ng- Chm- C- Song song- Rau ma- Cc- Bo- Mng- Bang- Cc- G- Mng- i- Cc- G- Mng...............

c im CY Mt l mmCY Hai l mmKiu rGn lThnS canh hoa

CY 2 LA MM

CY 1 LA MM

R chum

R coc

Song song hoc hinh cung

Hinh mang

Thn co hoc thn ct

Thn g hoc thn leo, thn bo

3 hoc 6 canh hoa

4 hoc 5 canh hoa

S l mm ca phi

CY 2 LA MM

CY 1 LA MM

R chum

R coc


Hinh mang

Thn co hoc thn ct


3 hoc 6 canh hoa

4 hoc 5 canh hoa

Phi co 1 la mm

Phi co 2 la mm

S l mm ca phi

Cy mt la mm: co r chum, thn co hoc thn ct, gn la hinh cung hoc song song, va hoa thng 4 hoc 5 canh
VD: lua, ng, re quat,.
Cy hai la mm: co r coc, thn g, thn co hoc thn leo, gn la hinh mang, va hoa thng co 3 hoc 6 canh
VD: Da can, rau ma, cai, bang,.





II/ c im phn bit gia lp hai la mm va lp mt la mm

R chum

R coc


Hinh mang

Thn co hoc thn ct


3 hoc 6 canh hoa

4 hoc 5 canh hoa

Phi co 1 la mm

Phi co 2 la mm

c im phn bit gia lp mt la mm va lp hai la mm la gi?
c im CY Mt l mmCY Hai l mmKiu rGn lThnS canh hoaS l mm ca phi


c im chu yu phn bit gia lp mt la mm va lp hai la mm la s la mm cua phi.


c im chu yu phn bit gia lp mt la mm va lp hai la mm la s la mm cua phi. Ngoai ra con mt vai du hiu phn bit khac nh kiu r, kiu gn la, dang thn, s canh hoa,..

Em hy nhn bit cy Mt l mm v cy Hai l mm:

Hai l mm

Mt l mm

Ta bit thc vt ht kn rt a dng, trong thin nhin c

th gp nhng trng hp ngoi l, v d: c cy hoa khng

cnh hoc ngc li rt nhiu cnh, l ca mt vi cy Hai l

mm c khi c cc gn chnh xp hnh cung,Trong nhng

trng hp ny, nhn bit cy thuc lp no cn phi da

vo nhiu c im khc nhau ch khng th ch da vo

mt c im no .

1

1

2

2

5

4

3

3

1

1

2

2

3

3

4

5

TRO CHI: EM L NH V CH

XANH

O

1

2

3

4

5

6

1. Neu ac iem cua cay Mot la mam ?

5. Ke ten ba loai cay thuoc lp Hai la mam?

4. Ke ten ba loai cay thuoc lp Mot la mam?
ac iem cua cay Mot la mam la: re chum, gan la song
song hoac hnh cung, hoa co 3 hoac 6 canh.

2. ac iem phan biet chu yeu la so la mam cua phoi

2. ac iem chu yeu e phan biet gia lp Hai la mam

va lp Mot la mam ?

3. Co the nhan biet mot cay thuoc lp Hai la mam hay

lp Mot la mam nh nhng dau hieu ben ngoai nao?

3. Dau hieu ben ngoai: kieu re, kieu gan la, so canh hoa, dang than

6. Thc vat Hat kn gom may lp?

6. Thc vat Hat kn gom hai lp: Lp Hai la mam

va lp Mot la mam

- Hoc bai, tra li cau hoi SGK.

- oc muc: Em co biet

- On lai cac nhom thc vat a hoc t tao en Hat kn.

- Chuan b bai 43: Khai niem s lc ve phan loai thc vat.

Hng dn HS t hoc nha:

CHUC CAC EM HOC TT

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Bai 42 Lop Hai La Mam Va Lop Mot La Mam