Tinh co phat hien nhung sai sot trong SGK Vat ly

Tags: SGK Vat, GS Nguyen Van Chanh, kinh hien vi dien tu, nang cao chat luong, o to van tai, kien thuc co ban, sach giao khoa, so boi giac, con ky nhong, cua dong dien, sai sot, vat ly, hoc sinh, tai sao, bo sach, loi


Tinh co phat hien nhung sai sot trong SGK Vat ly
SGK gop phan nang cao chat luong day va hoc. (Anh: HCM Cityweb)

Mot bo sach tot can phai khong co loi ve kien thuc va in an. De nang cao chat luong giao duc thi sach giao khoa va sach danh cho giao vien can phai han che toi da nhung sai sot kien thuc co ban, ma trong do nguoi bien soan sach dong vai tro quyet dinh.

Day la nhung tam huyet cua GS Nguyen Van Chanh gui den nhung nguoi bien soan sach giao khoa khi tinh co GS phat hien hau het cac Sach giao khoa (SGK) va Sach danh cho giao vien (SGV) o mon Vat Ly tu lop 6 den lop 9 deu co nhung sai sot ve chuyen mon.

Gan day toi co nghe nhieu y kien, dac biet cua Vien chien luoc va Chuong trinh giao duc danh gia rat cao ve sach giao khoa doi moi.


Nhung khi mua bo sach ve toi van than trong: doc sach cho ky, tu do chuan bi kien thuc de khi cac chau toi hoi, toi tra loi duoc. Khong may cho toi, cang doc bo sach giao khoa Vat ly da mua toi cang thay co nhieu cho sai, sot.

Toi noi la nhieu vi tu xua khi hoc van pham da duoc day: Khi nao so luong bang hay la lon hon hai phai dung so nhieu. Con nhung sai sot do la lon hay nho, co tram trong khong thi toi chua dam noi vi con phai cho cac nha ly luan ve phuong phap day hoc dinh nghia.

Tot nhat la toi phai trinh bay ro: sach da viet nhu the nao? Thay sai cho nao? Tai sao noi la sai?


Vi phai cu the, noi co sach mach co chung, nen trong pham vi mot bai viet, doi voi sach Vat ly o moi lop, toi chi co the noi ro vai cho ma toi cho la sai sot va chi noi ve sai sot chuyen mon. Neu co dip, toi co the trinh bay them hang loat sai sot chuyen mon tuong tu cung nhu nhung van de khong on trong viec dung bo sach giao khoa ve Vat ly nay lam bo sach giao khoa "chuan" de day cho hoc sinh trong nhieu nam
”.

De lam ro ve nhung sai sot chuyen mon trong SGK, GS Nguyen Van Chanh da dua ra mot loat vi du ve sai sot chuyen mon trong SGK va SGV o mon Vat ly tu lop 6 den lop 9. Do dung luong bai viet chung toi xin duoc chuyen tai mot so sai sot ma GS Nguyen Van Chanh neu ra:

1.O sach giao khoa Vat ly cho hoc sinh lop 9 (SHS 9) trang 34 viet:


Kinh hien vi dien tu co so boi giac den 1.000.000x.

Thac mac: So boi giac cua kinh hien vi dien tu la gi? Co tai lieu nao, sach nao noi den so boi giac cua kinh hien vi dien tu khong? (Xua nay nguoi ta chi noi den do phong dai cua hien vi dien tu - phai chang la vi o chuong trinh THPT chi cho phep noi den so boi giac nen khi noi do phong dai o kinh hien vi dien tu phai chuyen sang noi so boi giac. Trong sach lai nhan manh so boi giac khong phai la so phong dai. Tai sao bat hoc sinh chi hoc so boi giac khi trong thuc te lai dung do phong dai.

2. SHS 9 tr. 145

Con tac ke hoa (con goi la con ky nhong) khi leo cay nao se co mau la cua cay ay. Do la do cau tao dac biet cua da con ky nhong.

Thac mac: Tren qua dat nay co hay khong loai tac ke hoa khi leo cay nao se co mau la cua cay ay? Cau tao dac biet cua da con ky nhong ay nhu the nao? Tai sao lai noi ve con ky nhong o phan hoc ve mau sac va phan xa anh sang?

3. SGV 9 tr. 283


Mot trong nhung nguyen nhan quan trong lam cho con ky nhong co the doi mau khi vao nhung vung cay co mau sac khac nhau la da cua no co nhung vay nho mau trang tan xa toi tat ca cac anh sang mau. Do do khi vao vung cay co mau nao, no se tan xa mau do.

Thac mac: Da con tac ke co mot it vay mau trang hay toan bo chi la vay mau trang? Co loai tac ke nao da chi gom cac vay mau trang khong? Neu co thi tai sao ta khong nhin thay tac ke mau trang ma no lai doi mau khi vao nhung vung cay co mau sac khac nhau. (Van de doi mau o da con tac ke da co gop y cu the cach day hon hai nam nhung co le cac tac gia sach van xem minh dung nen o sach tai ban khong co sua chua).

4. SHS 9, tr. 92

Nguoi ta su dung tu truong de nang cac tau dien chay tren cac dem tu ... Khi tau chay cac nam cham dien cuc manh nhac no len khoi duong ray. Nho the tau dien chay rat em khong tieng dong va khong ma sat.


Thac mac: Chay em thi nghe co ly nhung co phai khong tieng dong va dac biet khong ma sat khong. Neu la khong ma sat thi tau chi con chuyen dong theo quan tinh? (Mot quyen sach it co cho hay ma noi la khong hay cung co the gay nhieu tranh cai o nguoi lon con doi voi cac em hoc sinh tu cho it ma sat noi thanh khong ma sat co the lam cho cac em bi hoang tuong).

5. SHS 8 tr. 23

C8 - Hay giai thich cac hien tuong sau:

d - Mat lop o to van tai phai co khia sau hon mat lop xe dap.
SGV trang 41 (tra loi cho bai tap C8)

d. Khia ranh o mat lop o to van tai phai co do sau hon mat lop xe de tang do ma sat voi mat duong. Ma sat nay co loi de tang do bam cua lop xe voi mat duong luc xe chuyen dong. Khi phanh, luc ma sat giua mat duong va banh xe du lon lam xe nhanh chong dung lai. Ma sat o truong hop nay la co loi.

Thac mac: Tai sao khia ranh o mat lop o to van tai phai co do sau hon mat lop (?) de tang do ma sat voi mat duong. Van dung ly thuyet nao da hoc de noi la co khia ranh la tang do ma sat?


Tai sao noi khi phanh luc ma sat giua mat duong va banh xe lai du lon lam xe nhanh chong dung lai? Vay khi phanh xe o to cai ma phanh tac dung vao dau?


6. SHS 8 tr 92

C1. Tai sao dung bep than lai loi hon dung bep cui

SGV 8 tr. 137

Vi than co nang suat toa nhiet lon hon cui. Ngoai ra co the neu nhung loi ich khac cua viec dung than thay cui khac cua viec dung than thay cui nhu: don gian, tien loi, gop phan bao ve rung v.v…

Thac mac: Than o cau hoi la than gi? Than cui, than da hay than to ong? Loi nhieu hay loi it o cau hoi la loi ve mat gi? Loi ve tien, loi ve thoi gian, loi ve mat thuan tien, loi ve bao ve moi truong, loi ve bao ve rung, loi ve nang suat toa nhiet hay loi ve tat ca cac mat?

Day la cau hoi cho hoc sinh vung rung nui, vung co nhieu mo than da, hoc sinh o nong thon, hoc sinh o thanh thi hay la hoc sinh noi chung trong toan quoc. Ra cau hoi nay nham muc dich gi? Danh gia tra loi cau hoi nay nhu the nao?


Neu tra loi: Dung bep cui loi hon dung bep than hoac dung bep than hay bep cui deu khong co loi. Thi co sai khong?


(Ra cau hoi rat chu quan, cu buoc hoc sinh phai nghi la xet ve loi hai cua cai bep chi co mot tieu chuan phai xet la nang suat toa nhiet).

7. SGV 7 tr. 139


22.1. Tac dung nhiet cua dong dien la co ich trong hoat dong cua noi com dien, am dien.
- Tac dung nhiet cua dong dien la khong co ich trong hoat dong cua quat dien may thu hinh va may thu thanh.


Tuyet da so may thu hinh hien nay la dung man hinh CRT. Vay o may thu hinh, tac dung nhiet cua dong dien de nung nong cac soi dot cho phat ra, nhiet dien tu, co tia nay moi co duoc hinh tren man hinh. Vay o day tac dung nhiet cua dong dien co phai la khong co ich hay khong?


(Khong nghi cho thau dao khi ra cau hoi va tra loi).

8. SHS 6 tr. 59

C5. O dau can (chuoi) dao, liem bang go thuong co mot dai bang sat, goi la cai khau dung de giu chat luoi dao hay luoi liem. Tai sao khi lap khau nguoi tho ren phai nung nong khau roi moi tra vao can?


Neu tra loi la de cho khi cai khau nguoi thi co lai giu chat nhu o SGV 6 thi tra loi cho hoc sinh the nao khi hoc sinh hoi: Em thay tho ren nung do cai chuoi dao, chuoi liem de dong vao can go sau khi cai can go da duoc dong cai khau. Vay thi khi nguoi cai dao, cai liem bi long can ngay co phai khong? Lam the nao tra loi?


(Can liem, can dao khong may khi lam bang go that tot va cung kho got rua cho that chinh xac. Tho thu cong thuong dui thung go bang cach dung dui sat ho nong do cam vao go cho sat nong lam chay go. Tuong tu viec lap cai khau cung vay. Cung nhu van de tan dinh rive, su co vi nhiet khong co vai tro gi dang ke, ban than cai khau rat nho.)

...

Mac du nhung gop y cua GS Chanh la kha tam huyet voi nen giao duc nuoc nha, nhung chua mot co quan chuc nang nao tiep thu.

Truoc day toi da neu hang chuc sai sot, nhung sau do khong thay phan hoi phia Bo Giao duc. Con den tram cho nua theo toi la sai sot o bo sach giao khoa Vat ly Trung hoc Co so (toi chua noi den SGK Vat ly Trung hoc pho thong)”, GS Chanh chia se.

Hoai Phuong
(Luoc ghi Thu gop y SGK cua GS Vat ly Nguyen Van Chanh)

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Tìm hiểu: SGK Vat, GS Nguyen Van Chanh, kinh hien vi dien tu, nang cao chat luong, o to van tai, kien thuc co ban, sach giao khoa, so boi giac, con ky nhong, cua dong dien, sai sot, vat ly, hoc sinh, tai sao, bo sach, loi

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