2019-2020年新教科版科学四年级下册第四单元岩石和矿物期末复习资料知识点整理.doc

2019-2020年新教科版科学四年级下册第四单元岩石和矿物期末复习资料知识点整理1、页岩、砂岩、花岗岩、石灰岩、大理岩是几种常见岩石3、花岗岩主要是由石英、长石和云母三种矿物组成。岩石都是由一种或几种矿物组成的。矿物是组成地壳岩石的重要物质。4、颜色、条痕、软硬是矿物的重要特性。有的矿物具有多种颜色，矿物的颜色、条痕、软硬是识别矿物的重要依据，矿物的条痕比矿物的外表颜色更可靠。5不同矿物的透明度、光泽和形状是不同的。岩石和矿物是地球上的宝贵资源，他们不能再生，我们要很好地保护和利用。岩石和矿物有关知识：1、根据岩石成因，我们可以把岩石分为岩浆岩、沉积岩、变质岩。2、我们观察岩石的方法有看、摸、闻、掂、刻等。我们可以观察岩石的花纹、轻重、颜色、光泽、软硬、条痕、气味等来描述岩石。4、我们可以用指甲、铜钥匙、小钢刀等工具粗略的来检验矿物的软硬。可把矿物分成几个等级：软-能用指甲刻划出痕迹。较软-不能用指甲刻划出痕迹，但能用铜钥匙刻划出痕迹。较硬-不能用铜钥匙刻划出痕迹，但能用小刀刻划出痕迹。硬-用铜钥匙、小刀都不能刻划出痕迹。5、冷热、风、地表变动、植物的根等都会对岩石产生变化。岩石在大气、水、生物等长期联合作用下发生变化的现象叫风化。岩石风化后产生了沙和泥土。6、在生活中，我们的钟表、计算机、铅笔等地方都用了岩石和矿物。含有古代生物的遗体或遗迹的岩石叫做化石。附送：2019-2020年新标准英语三年级上Module2IntroductionsUnit2Whatsyourname英文教案一、Teaching content:英语(新标准)第一册Module 2 Unit 2. 二、Teaching aims:1、Knowledge aim: 1)To learn to say “ Whats your name?”2)Can read the pronunciation of Letter “m” in the word.2、Ability aim: To train them to ask someones name.3、Emotion aim: To improve the students basic English about introductions.三、Key points: The way of introductions : “ Whats your name? Im ”四、Difficult points: Speak and act fluently.五、Teaching resources: word cards, name cards of cartoons, pictures, tape recorder.六、Teaching procedure:Step 1: Greeting with students.T: Good morning, boys and girls. S: Good morning, Ms Zhou.T: How are you today?S: Im fine. And how are you?T: Im fine, thank you.Step 2: Presentation and practice1)The teacher walks around the students and says: Whats your name? Let the students answer with “Im” Do more examples.2) Learn the sound of letter “m”. Show the cards: name, Sam, Im.3)Learn the sentence: Whats your name?4)Practice：choose a reporter walks the class and ask.(Show the name cards and answer with their new names of cartoons.) Then work in pairs.5)Act it out with names of Sam, Amy, Daming and Lingling:Dialogue A: Hello/ Hi, Im Whats your name？ B: Hi / Hello，Im Whats your name? C: Hi/Hello, Im Whats your name? D: Dialogue : A: Good afternoon. Im . B: Good afternoon. Im A: How are you? B: Im fine. And how are you? A: Im fine, too. Thank you. B: Goodbye, 6) Look at the photo of the students Chinese teacher and ask the students:Is he Mr liu? (重读Mr.)Is he Mr Wang? Is he Mr Ma?Then teach the words: Mr, Ms afternoon. Now say good afternoon to me and Mr Ma, please. Now say good afternoon to your classmates. (Practice for a while)Step 3 Learn the dialogue1)Listen ang follow the tape.2)Role-play: A group will be Mr Li, another group will be Sam or boys will be Mr Li, girls will be Sam, then change.Step 4 Learn a song: Good morning, Sam1)follow the tape recorder and say the words of song. 2)Please try your best to learn to sing together. 3)