【Shanghai Textbook Edition】Junior High School Science Grade 8 Part 1
This textbook is part of the compulsory education curriculum, covering core scientific topics such as Earth's hydrosphere, atmosphere, lithosphere, biosphere and ecosystems, and the hierarchical structure of the material world. Through observation, experimentation, and inquiry activities, it aims to develop middle school students' scientific literacy and evidence-based thinking.
Course Overview
📚 Content Summary
This textbook is part of the compulsory education curriculum, covering core scientific domains such as Earth's hydrosphere, atmosphere, lithosphere, biosphere and ecosystems, and the hierarchical structure of the material world. Through observation, experimentation, and inquiry activities, it aims to cultivate middle school students' scientific literacy and evidence-based thinking.
Explore the mysteries of Earth’s spheres and embark on a journey of discovery into the material world.
Author: Zhao Zheng, Liu Jiemin
Acknowledgments: Reviewed by the Ministry of Education 2013, Shanghai Educational Publishing House
🎯 Learning Objectives
- Accurately describe the concept of the hydrosphere and use a pie chart to illustrate the distribution of Earth's water.
- Identify major classifications of terrestrial water and compare and explain differences in hydrological characteristics between rivers in southern and northern China.
- Draw and explain the main processes of the water cycle (ocean–land, inland marine, and land-only cycles) and their significance for the environment.
- Accurately identify atmospheric composition and its ecological significance, and describe features of atmospheric vertical layering.
- Understand that solar radiation is the energy source and the ground is the direct heat source, and be able to explain the greenhouse effect and heat balance in the atmosphere.
- Master the principles of thermal circulation and apply them to analyze the formation of sea-land breezes, monsoons, and global prevailing wind belts.
- Understand the concepts of pressure and stress, master the pressure formula P=F/S, and explain phenomena related to increasing or decreasing pressure in daily life.
- Grasp the characteristics of pressure within liquids and explain the origin of buoyancy based on pressure differences.
- Use Archimedes’ principle to calculate buoyant force and determine whether an object floats or sinks based on density and force relationships.
- Identify and describe Earth’s internal layer structure (crust, mantle, core), and understand the scope of the lithosphere.
Lessons 共 11 课时 · 预计 33.0h
Lessons
Lesson
本课程介绍了地球水圈的构成与分布，重点分析了海洋、冰川及地下水等水体的理化特性，并深入探讨了水循环的三大路径及其在调节全球气候、塑造地表形态和维持生态平衡中的关键作用。
本课程介绍了地球大气的垂直分层结构及其各层特性，重点阐述了地面作为大气直接热源的原理及温室效应的作用。同时，通过分析海陆热力性质差异，解释了热力环流的形成机制，揭示了风的产生与大气运动的规律。
本课程深入探讨了压强与浮力的物理本质，通过压强公式 $P=F/S$ 和液体压强规律 $P=\rho gh$ 解析了力在流体中的分布与传递。学习重点在于掌握阿基米德定律，理解浮力源于液体上下表面的压力差，并能运用这些原理分析生活中的增减压智慧及工程应用。
本课程深入探讨了地球的内部圈层结构、地壳的物质组成以及岩石的三大分类。通过学习岩石圈的物理特性、矿物的形成规律以及岩浆岩与沉积岩的成因差异，学生将掌握如何利用地震波、结晶结构及化石等科学证据来解读地球的演化历史。
本课深入探讨了地壳运动的力学机制，通过褶皱、断层、大陆漂移假说及板块构造学说，揭示了地球表面形态演变的逻辑。学生将学习如何通过地质构造识别地貌特征，并理解地震与火山喷发作为地壳能量释放的宏观表现，从而掌握板块边界与全球地质活动分布之间的内在联系。
本课主要介绍了地球表面的空间定位与地形刻画，重点讲解了经纬网坐标判定、海拔与相对高度的测量，以及陆地与海底地形的分类。通过学习等高线地形图的绘制原理，学生能够掌握如何将三维地表特征转换为二维平面图形，并理解地形对地理环境及人类活动的影响。
本课介绍了生物圈作为地球上最大生态系统的核心概念，重点探讨了生物生存所需的六大基本要素（营养、阳光、空气、水、温度和空间）。通过分析“生物圈2号”实验的失败案例，强调了自然生态系统的复杂性与不可替代性，引导学生认识到保护地球这一唯一生命家园的重要性。
本课介绍了生态系统的核心功能与结构，重点讲解了林奈双名法与二分式检索表的分类应用，以及生态系统中能量单向流动、物质循环往复的动态规律。通过分析食物链与食物网的营养结构，学生将理解生物与环境之间相互依存的平衡机制，并认识到保护生物多样性对维持生态系统稳定的重要意义。
本课程探讨了地月系统与太阳的物理特性，分析了万有引力如何维持太阳系的秩序，并对比了类地行星与类木行星的结构差异。同时，通过提丢斯-波得定则及小行星、彗星等天体的研究，揭示了太阳系多层次的演化规律与观测科学的重要性。
本课重点探讨了细胞核作为生命“指挥中心”的遗传调控作用，以及生物体如何通过细胞分裂、分化及组织器官的有序构建，实现从受精卵到复杂个体的生命演化。学习目标在于理解遗传物质DNA的载体功能，并掌握细胞分裂与分化在维持生命活动及构建生物体结构层次中的核心逻辑。
本课程深入探讨了物质的微观结构，重点讲解了分子、原子和离子的构成及其运动规律，并阐述了化学变化的本质是原子的重新排列组合。通过学习相对原子质量、离子形成及物质分类，学生将掌握从微观视角分析化学现象与物质性质的核心逻辑。