2022年2019年人教版初中生物七年级上册基础全套知识点总结范文 .pdf
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1、2019 年人教版初中生物七年级上册基础全套知识点总结范文1.生物学是研究(生命现象)和(生命活动规律)的科学。2.生物的特征:动物吃食物,植物光合作用制造有机物:(生物 的生活需要营养);鲸呼气时产生雾状水柱,植物通过气孔吸收氧气,排出二氧化碳:(生物能进行呼吸);人出汗、呼出气体和排尿,植物落叶:(生物能排出体内产生的 废物);动物追猎物,含差草叶片合拢:(生物能对外界刺激作出反应);植物产生种子,动物产卵、产崽:(生物能生长和繁殖);除(病毒)外,生物都是由(细胞)构成的。3.有时因为调查的范围很大,不可能逐个调查,就要选取一部分调查对象作为(样本),这称为抽样调查。4.按照(形态结构)
2、特点,将生物归为(植物、动物)和其他生物三大类;也可以按照(生活环境)将生物划分为(陆生生物和水生生物)等;还可以按照用(用途)将生物分为作物、家禽、家畜宠物等。5.地球上(适合生物生存的地方)其实只是它表面的一薄层,科 学家把这一薄层叫做(生物圈)。6.如果以(海平面)为标准来划分,生物圈向上可达约(10 千米)的高度,向下可深入(10 千米)左右的深处。这个厚度为20 千米左右的圈层,包括(大气圈的底部)、(水圈的大部)和(岩石圈的表面)。7.大气圈是由(多种气体)组成的,如氮气、氧气、二氧化碳等。8.水圈包括地球上(全部的海洋和江河湖泊)。9.(岩石圈)是地球表层的固体部分。它的表面大多
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9、0Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3土壤,是一切陆生生物的立足点。10.动物植物等所有生物生存所需要的基本条件是一样的,它们都需要(营养物质)、(阳光)、(空气和水),还有(适宜的温度)和(一 定的生存空间)。动物需要的营养物质是(食物),植物需要的营养物质(即肥料)是(无机盐)。11.影响生
10、物生活的环境因素可以分为两类,一类是(光、温度、水、空气等)非生物因素,另一类是生物因素。生物因素是指影响某种生物生活的其他生物,如(草、细菌等)都可能是生物因素。12.探究的一般过程是从(发现问题、提出问题)开始的。探究的 一般过程包括(提出问题、作出假设、制定计划、实施计划、得出结论、表达和交流)。13.做完实验后,要把小动物(放回适合它们生存的自然环境中,即放生)。14.在光对鼠妇生活的影响探究实验中,使这两种环境中除(光 照)外,湿度、温度等其他条件都相同。也就是说,只有光照是不同的,光照就是这个实验中的(变量)。文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q
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17、L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T315.在研究一种条件对研究对象的影响时,所进行的除这种条件不同以外,其他条件都相同的实验,叫做(对照实验)。例如:探究“光对鼠妇生活的影响”实验中,设计(阴暗)、(明亮)两种环境,其他条件都相同,就是对照实验。16.生物与生物之间,最常见的是(捕食)关系,如七星瓢虫捕食蚜虫。还有(竞争)关系,如稻田里的水稻和杂草;(合作)关系如蚂蚁、
18、蜜蜂等昆虫组成的大家庭。17.生物与环境的关系:生物与环境(相互依存,相互影响)。18.生物对环境的(适应)如:骆驼尿液少,体温升到46 C时才 出汗;沙漠中的植物大多根系发达,叶片退化成刺等。生物对环境的(影响)如:蚯蚓改良土壤,植物保持水土等。19.在一定地域内,(生物)与(环境)所形成的统一的整体叫做(生态系统)。文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9
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24、3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T3文档编码:CO5S1L7
25、R3I9 HE6C8I8V5O1 ZB8L10Q3Y5T320.(植物)能够(通过光合作用制造有机物),是生态系统中的(生产者);(动物)不能自己制造(有机物),它们直接或间接地以植物为食,因而叫做(消费者);(细菌)和(真菌)能将(有机物)分解成简单的(无机物),是生态系统中的(分解者)。生态系统的组成成分中除了有生物外,还有(非 生物部分),如(阳光)、(空气)和(水)等。(植物一一生产者,动物消费者,细菌和真菌分解者)。21.生产者和消费者之间的关系,主要是(吃与被吃)的关系,这样就形成了(食物链)。22.一个生态系统中,往往有很多条食物链,它们彼此交错连接,形成了(食物网)。23.生态
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