Конспект урока "Размножение растений"

Учитель: Сельханова К.М.                                                                                                                                                                                                               Тема: Размножение растений.                                                                                                                                                                          Цель: создание условий для формирования  у учащихся знаний о разных способах размножения растений.                                                                                                                                                                                                                                                                                                               Планируемые результаты:                                                                                                                        Личностные: развитие мотивов учебной деятельности и формирование личностного смысла учения, развитие самостоятельности, формирование внутренней позиции школьника- бережно относящегося к природному достоянию человека.                                                                                                                                                                                                                  Регулятивные: определение общей цели и путей её достижения, формирование умения работать по плану, контролировать и оценивать учебные действия, корректирование выполнения задания в соответствии с результатом действий.                                                                                                             Познавательные: извлечение информации предоставленной в разных формах, осуществление анализа и синтеза.                                                                                                                                                                              Коммуникативные: использование речевых средств, для решения различных коммуникативных задач; владение монологической и диалогической речи, умение высказывать и обосновывать свою точку зрения; уметь принимать чужую, договариваться и приходить к общему решению.                                                                                                                                                  1. Орг. момент.                                                                                                                                                     2.Формулирование темы и цели урока.                                                                                                                                  (На столе стоят герань, хлорофитум, фиалка, цирантус)                                                                                                                          -Наш класс получил задание озеленить коридор, но у нас всего 4 цветка. Что же делать?               Рассматриваются различные способы решения данной задачи.                                                                                                Определение темы урока.                                                                                                                                     3. Открытие нового. Составление кластера.                                                                                                         

                                         Растение.  

Корень       стебель          лист                 цветок                       плод (семя)

-Подумайте какие части растений нужны для размножения растений?                                                                                -Рассмотреть рисунок и рассказать как размножаются растения.                                                                                                                                                  –Многие растения размножаются при помощи семян, вспомните, где образуются семена у растения?                                                                                                                                                                                             -Плод у растений- это орган размножения. В некоторых плодах бывает одно семя, а в других-много.                                                                                                                                                                                                                    –Зачем растению так много семян?                                                                                                                                                                                                   -Закончить предложение:                                                                                                                                                                              Чем больше образуется семян, тем больше………..                                                                                                                                               4.Работа со словарём.                                                                                                                                                                       Значение слова размножение.                                                                                                                                                                                                                                                                                          5. При помощи загадок дети делятся на группы.                                                                                                                                                                                         (Ромашка, ландыш, одуванчик, мак)                                                                                                                                                                                                                                                               Сидит в саду кудряшка- белая ромашка.                                                                                                                                                        Сердечко золотое, что это такое?

На зелёном шнурочке белые звоночки.

На зелёной крупной ножке вырос шарик у дорожки.

Голова на ножке, в голове горошки.                                                                                                                                                                                                                                                         Сердце жжёт макушку, сделать хочет погремушку.

Посадили зёрнышко вырастили солнышко.                                                                                                             6.Учащиеся рассаживаются по группам. Каждая группа берёт растение и карточку, на которой указан способ размножения и дан алгоритм практической работы.

1 группа- фиалка.                                                                                                                                                                                              Инструкция.                                                                                                                                                         Размножение листовыми черенками.                                                                                                                                                                                                               *Полей почву.                                                                                                                                                               *Сделай углубление  палочкой.                                                                                                                                                           *Возьми целый лист с черенком.                                                                                                                                                                                             *Черенок помести во влажную почву так, чтобы нижняя поверхность листа была обращена  к стенке горшка, основание пластинки не должно касаться почвы.                                                                                                                                    *Закрепи черенок.                                                                                                                                               *Накрой стеклянным стаканом.                                                                                                                                                        * Поставь в тёплое, светлое место.                                                                                                                                                                                                                                                                                                                      Через 2-3 дня после посадки надо ежедневно приподнимать стакан, чтобы попадал кислород. Поливать тонкой струйкой по краям горшка, чтобы не размыть почву вокруг черенков.                                                                                                                                      2 группа-герань.                                                                                                                                                                          Размножение стеблевыми черенками                                                                                                                                                                            * Отрежь веточку наискось под четвёртым листом длиной от 7 до 15 см.                                                                                                                                                      *Отрежь нижний лист.                                                                                                                                                   * Поставь в воду до появления корней.                                                                                                                         *Сделай углубление палочкой.                                                                                                                                                                                                 *Черенок вставь в углубление.                                                                                                                                               *Закрепи, присыпав землёй.                                                                                                                                                                                                                      *Полей                                                                                                                                                                                   Через 2-3 дня после посадки надо ежедневно приподнимать стакан, чтобы попадал кислород. Поливать тонкой струйкой по краям горшка, чтобы не размыть почву вокруг черенков.                                                                                                                                                                                                                                                                                                                                                               Можно накрыть стеклянным стаканом и поставь в светлое место.                                                                                                  3 группа-хлорофитум.                                                                                                                                                                                      Размножение усами.                                                                                                                                          * Полей почву.                                                                                                                                                                              * Не отрезая от куста ус, закрепляем, присыпая землёй.                                                                                                                                                                                  *После укоренения растение отделяют от материнского.                                                                                                             Когда растение укрепиться,                                                                                                                                                                                             аккуратно отделить укоренившийся росток от материнского при помощи ножа.                                                                                                                                                                                                                 4.группа-цирантус                                                                                                                                                                                                                                                                                                                                                                                                Размножение луковицей.                                                                                                                                                                                       *Полей почву.                                                                                                                                                                                *Сделай углубление.                                                                                                                                                                               *Отделите луковицу.                                                                                                                                                                                                       *Луковицу вставь в глубину.                                                                                                                                                                     * Закрепи.                                                                                                                                                                                                             * Полей.                                                                                                                                                                                                5 группа-работа по рисунку- составить план размножения кустом.                                                                                                                                *Рассмотри внимательно рисунок  составь план деления куста.                                                                                                    * Ответить на вопрос как называется данный способ размножения?                                                                                                                                                        7.Слушание групп. Презентация работ.                                                                                                                                  8.Работа по учебнику.                                                                                                                                                                                                                                     Чтение статьи.                                                                                                                                                                                         –О каких способах размножения растений вы узнали?                                                                                                                                                     9.Физминутка музыкальная.                                                                                                                                                               10. Презентация «Размножение растений»                                                                                                                                                                                                                                                                 11.Работа в тетрадях. Записать все виды размножения растений.                                                                                                                                                        12.Работа в парах сменного состава.                                                                                                                           Карточка № 1.                                                                                                                                                                                     –Как размножается земляника?                                                                                                                                                            -Какой орган растений  прорастает из семени?                                                                                                                                               Карточка   № 2.                                                                                                                                                                                                           –Какие органы растут на ветках?                                                                                                                       -Как размножается картофель?                                                                                                                                                                                                                                                                 13. Составление синквейна.                                                                                                                                                                                                                                                                                  14. Рефлексия.                                                                                                                                                                                                       Я понял….                                                                                                                                                                                                                                                         Я  не понял…                                                                                                                                                                       Было интересно….