Đăng bởi Hoàng Oanh
"khai-niem-ve-chuyen-dong-cua-trai-dat-quanh-mat-troi"
"chuyen-dong-quy-dao-cua-trai-dat"
"chuyen-dong-tu-quay-cua-trai-dat"
"luc-hap-dan-giua-trai-dat-va-mat-troi"
"thay-doi-cua-cac-mua-trong-nam"
"anh-huong-den-khi-hau-va-sinh-vat-tren-trai-dat"
"ung-dung-trong-du-bao-thoi-tiet"