"Три состояния материи" ("Three States of Matter")
разработка учебного занятия по английскому языку
Автор: Родненко Ирина Михайловна, преподаватель английского языка, ГБПОУ ВПК им. В.И.Вернадского, город Волгоград
В раздел среднее профессиональное образование
Открытый урок по предмету «Английский язык»
Тема:
«Три состояния материи» (“Three States of Matter”)
Тип урока:
урок обобщения и систематизации знаний
Вид урока:
урок с элементами визуализации
Цель урока:
- учебная: активизация изученных лексических единиц и структур в устной речи в форме монологического высказывания по теме; - развивающая: активизация творческих способностей и познавательного интереса студентов, развитие умений выделять главное, обобщать, логически излагать свои мысли, взаимодействовать в паре и группе.
Метод обучения:
по типу познавательной деятельности – частично- поисковый, по источникам познания – словесно-наглядный.
Оборудование:
- ТСО: мультимедийный проектор, персональный компьютер; - учебно-наглядные пособия: раздаточный материал (тексты, карточки с заданиями).
Ход
урока
1.
Оргмомент
- Good morning, dear students! I’m glad to see you. Sit down, please. Now let’s begin our lesson. - Who is on duty today? - Who is absent? - What is your home task for today? - Today we are going to speak about three states of matter and you`ll get some more information that refers to physical phenomena.
2. Воспроизведение и коррекция опорных знаний
2.1 Создание атмосферы иноязычного общения
Фонетическая зарядка
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We’ll start our lesson with the phonetic drill. Listen to me attentively and repeat the following words and word combinations after me: o Cоhesion o solid body o heat o motion o expand o rapid o diminish o attain o velocity o various o chaotically o liquid o melt o describe o phenomena o occur o density o bond 1
o considerably o reverse order o destroy o surface o vapour o rate of evaporation o volatile liquids o vast volume o assume o retain o fixed volume o shape o
o
2.2. Проверяет знание лексики по теме. Корректирует знания
o - I want to make sure you know the meaning of these words. Give me English equivalents of some Russian words and word combinations, then translate the sentences from Russian into English. o летучие жидкости o принимать o разрушать o скорость o твердое тело o сцепление o огромный объем o значительно o удерживать o поверхность o обратный порядок o быстрый o скорость испарения o пар o плотность o плавиться o оставаться o расширять 2
o o o -Притяжение между молекулами твердого тела очень велико. o -Тело расширяется при нагревании. o -Притяжение между молекулами ослабевает. o - Молекулы находятся в состоянии непрерывного движения. o -Твердое тело превращается в жидкость. o -Необходимо выполнить работу, чтобы разрушить связь между молекулами. o -При нагревании жидкости, скорость испарения увеличивается. o -Такие жидкости называются летучими. o -Образование пара происходит внутри жидкости. o - Газ заполняет сосуд и легко сжимается и расширяется. o -Притяжение между молекулами пара практически не существует. o -Состояние вещества зависит от скорости его молекул.
o
2.3. Проверяет навыки аудирования. Корректирует знания
o Смотрят ролик по теме «Three States of Matter» и отвечают на вопросы. o Answer the questions: 1. What is any matter composed of? 2. What are the main states of matter? 3. What happens when a solid body is heated? 4. When did the cohesion among the molecules become weaker? 5. What is necessary to perform in order to separate the molecules from one another? 6. Why is the rate of evaporation increased? 7. What liquids are easily evaporated? 8. What does the state of substance depend on? o 9. Is helium lighter or heavier than air? 10.How can matter change? 11. Give me an example of the substance, which can have three states. o o
o
2.3. Проверяет навыки монологической речи. Корректирует
знания
o Воспроизводят изученный ранее текст. - Retell the text «Three States of Matter»
o
Three States of Matter
o We know that the cohesion between the molecules of a solid body is very great. A solid body retains its form. o When a solid body is heated, the motion of its molecules becomes more rapid. The cohesion among the molecules weakens; the body expands on heating. On further heating, the movement of the molecules becomes still more rapid and the attraction between them diminishes. o Finally, when the motion of the molecules has attained some velocity, the molecules begin to move among other molecules in various directions, chaotically, in disorder. The cohesion has become very much weaker. The body is no longer a solid. It has been transformed into a liquid; it has melted. o On cooling, the above described phenomena occur in exactly the reverse order. o At some temperature the density is so great that the liquid becomes a solid body. o During melting the bond between the molecules becomes considerably weaker that in the solid body. In order to separate the molecules from one another, it is necessary to overcome the attraction between them, it is necessary to perform work to destroy the bonds between the molecules. The higher the temperature of the liquid, the greater the number of molecules escape from the liquid. Hence, when a liquid is heated, the rate of evaporation is increased. o Liquids whose molecules are weakly attracted to one another are easily evaporated. Such liquids are called volatile liquids. Less energy is required for their evaporation. o Attraction between molecules of vapour is practically non- existent. As a result of this, molecules of vapour move in all directions, collide with one another and occupy a vast volume in comparison with the volume of the liquid from which they were formed. o The state of substance depends on the velocity of its molecules. o o
2.4.Выполнение
творческого
задания
- A student of your group has prepared an additional information about plasma.
o (презентация «Plasma») o Answer the questions: 1. What is plasma? 2. Who discovered plasma? 3. Where can it exist? o o
o
3. Повторение основных фактов, обобщение и систематизация
знаний
o
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I hope that you remember the main facts, so make up the sentences of two parts and then translate them into Russian. o o 1. A gas takes a) a definite size and a definite shape; 2. A liquid has b) move about with great speed; 3. A solid has c) both the size and the shape of the vessel; 4. We have solid water d) has mass and takes up space; 5. In a solid the molecules e) freely in the air; 6. In a gas the molecules f) which we call ice; 7. Plasma can g) the movement of the molecules becomes o more rapid; 8. On further heating h) exist at a very high temperature. 9. Matter is anything that i) a definite size, but no definite shape; 10. The steam expands j) move very slowly; o
o
4.
Выполнение
практических
заданий
o Listen to the song attentively and fill the gaps:
o
Four states of matter
o 1.Every single ------ that we see around is composed of --------- wherever it is found, there are four different states of matter: -------, liquid, gas and plasma. o Solids are -------, o Liquids ---- run, o Gas can --------, o And ------- is in the sun. o 2. Solids are bits of matter like to ------ together to conserve an energy in freezing --
o There are four different states of matter: solid, liquid, gas and plasma. o Solids are hard, o Liquids can run, o Gas can expand, o And Plasma is in the sun. o 3. Matter in its liquid ----- is easy to pour, so you must be ------- or you spill it on the floor. o 4. Gas may be ---------, but we know it’s there, cause we feel its -------- around us in the air. o There are four different states of matter: solid, liquid, gas аnd plasma. o Solids are hard, o Liquids can run, o Gas can expand, o And Plasma is in the sun. o Plasma is the ------ matter by far and there is a lot of it in every -----. o There are four different states of matter: solid, liquid, gas аnd plasma.
o
5.
Контроль
и
взаимоконтроль
o You should choose the correct answer.
o
States of Matter Quiz Questions
o Choose any one options from the following: o 1. This state of matter has a definite shape and size o Gas o Liquid o Solid o Plasma o o 2. All of the matter is made up of
o Air o Water o Oxygen o Molecules o o 3. If we heat any state of matter, molecule go...........from each other o Closer o Nearer o Farther o Jump o o 4. Air around us exist in which state of matter? o Gas o Solid o Liquid o Plasma o o 5. Ice, Metal are example of which state of matter o Gas o Solid
o Liquid o Plasma o o 6. Molecules in this state of matter are most tightly packed o Gas o Solid o Liquid o Plasma o o 7. The molecules are most loosely packed in following state of matter o Gas o Solid o Liquid o Plasma o o o o o 8. On heating liquid becomes gas but on cooling a liquid can change into o Gas o Liquid
o Solid o Plasma o o o o 9. This state of matter does not have fixed shape or size; it takes the shape of the container o Gas o Solid o Liquid o Plasma o
o
6. Подведение итогов урока
o - Thank you for the answers. I hope you have enjoyed our activities and learned a lot of new things. o I`m satisfied with the lesson. You worked very well. You`ll get good and excellent marks today. o o o o
В раздел среднее профессиональное образование