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SINH HỌC 6
- Gv: Yêu cầu hs q.sát hình 3.1và 3.4, và tranh sưu
tầm (nếu có). Thảo luận nhóm:
? Xác định những nơi trên trái đất có TV sống?
Ruộng lúa, rừng, hồ sen, sa mạc…
? Kể tên một số cây sống ở Đ.bằng, đồi núi, nước,
sa mạc?
? Nơi nào có TV phong phú? Nơi nào ít TV?
? Kể tên 1 số cây gỗ, to lớn, thân cứng?
? Lấy vd 1 số cây sống trên mặt nước? Chúng có
đặc điểm gì khác cây sống ở cạn?
- Hs: Thảo luận, thống nhất ý kiến – trả lời.
- Gv: Cho HS nhận xét – bổ sung.
- Gv: Nhận xét, cho hs rút kết luận:
? Em có nhận xét gì về sự phân bố, số lượng của
TV?
- Hs: Trả lời
- Gv (nhấn mạnh): TV rất đa dạng khoảng 300.000
loài, riêng Việt Nam: 12.000 loài.
- Gv (chuyển ý): TV tuy có rất nhiều loại khác
nhau nhưng chúng có chung đặc điểm. Vậy đó là
đ.đ gì?
Hoạt động 2: Tìm hiểu đặc điểm chung của TV.
- Gv: treo bảng phụ (t.11 sgk). Yêu cầu hs q.sát –
thảo luận, hoàn thành bảng.
- Hs: Thống nhất ý kiến, hoàn thành được:
Bảng bài tập:
- Thực vật sống ở mọi nơi trên trái đất.
Chúng có rất nhiều dạng khác nhau, thích
nghi với môi trường sống.
2. Đặc điểm chung của thực vật: