【Shanghai Edition】Junior High School Science Grade 9, Semester 2

📚 Content Summary

This course covers the science curriculum for the ninth grade, lower secondary school, systematically exploring the evolution of the universe and stars, biological genetics and biodiversity conservation, healthy lifestyles, human immune mechanisms, resource environment and sustainable development, and the role of science and technology in advancing human civilization.

Explore the scientific mysteries from cosmic stars to life at the microscopic level, and practice a healthy, sustainable way of living.

Author: Shanghai Education Publishing House

Acknowledgments: Compulsory Education Textbook, reviewed and approved by the Ministry of Education 2013

🎯 Learning Objectives

1. Spatial Cognition: Describe the structure of the Milky Way (galactic center, galactic disk, galactic halo) and its position within the universe; distinguish between extragalactic galaxies and galaxy clusters.
2. Evolutionary Logic: Explain the physical process of stellar evolution—from birth to supernova explosion, forming neutron stars or black holes—and relate Earth’s formation to climate change.
3. Application of Scientific Theories: Understand the basic assumptions of special and general relativity (e.g., constancy of light speed, spacetime curvature), and use the Doppler effect to explain galactic redshift and cosmic expansion.
4. Elaborate on Heredity and Variation: Recognize biological heredity, describe the double-helix structure of DNA and its function as the primary genetic material, and understand the relationship among genes, DNA, and chromosomes.
5. Analyze Sex Determination and Genetic Applications: Explain the mechanism of human sex determination, understand the fundamentals of genetic engineering, and list preventive measures for human genetic disorders and their eugenic significance.
6. Investigate Evolution and Biodiversity: Provide examples of evidence for biological evolution (e.g., fossils), comprehend the chemical origin-of-life hypothesis, and articulate the value (genetic, species, ecosystem) and conservation pathways of biodiversity.
7. Cognitive Level: Accurately state the World Health Organization’s definition of “health” and differentiate between health, disease, and sub-health states.
8. Analytical Level: Through case analysis, identify the specific impacts of diet, genetics, lifestyle, and psychological factors on health, and understand the biopsychosocial-medical model.
9. Application Level: Recognize the value of aerobic exercise and apply learned knowledge to reflect on personal lifestyle, developing preliminary health management strategies.
10. Accurately describe the three main functions of the immune system and define infectious diseases along with types of pathogens.

🔹 Lesson 1: Mysteries of the Universe: Evolution of Stars and the Cosmos

Overview: This lesson guides ninth-grade students through the evolutionary journey from microscopic interstellar matter to macroscopic cosmic structures. Topics include the detailed structure of the Milky Way, extreme celestial bodies formed after stellar death (supernovae and black holes), Earth’s origin and evolution, and Einstein’s relativity redefining space and time. Finally, using the Doppler effect and Hubble’s Law, it reveals the Big Bang origin model and the future expansion of the universe.

Learning Outcomes:

• Spatial Cognition: Describe the structure of the Milky Way (galactic center, galactic disk, galactic halo) and its location in the universe; distinguish between extragalactic galaxies and galaxy clusters.
• Evolutionary Logic: Explain the physical processes of stellar evolution—from formation to supernova explosion, resulting in neutron stars or black holes—and connect Earth’s formation to climate change.
• Application of Scientific Theories: Understand the fundamental assumptions of special and general relativity (e.g., constancy of light speed, spacetime curvature), and use the Doppler effect to explain galactic redshift and cosmic expansion.

🔹 Lesson 2: The Code of Life: Genetics, Evolution, and Biodiversity

Overview: This lesson covers core biological mysteries related to life continuity and evolution. From the molecular level—genetic materials (DNA, genes, chromosomes)—to macro-level evolutionary history and biodiversity conservation, it aims to help ninth-grade students understand the material basis of inherited traits, causes of variation, mechanisms of human sex determination, and humanity’s responsibility in protecting biodiversity.

Learning Outcomes:

• Elaborate on Heredity and Variation: Recognize biological heredity, describe the double-helix structure of DNA and its function as the primary genetic material, and understand the relationships among genes, DNA, and chromosomes.
• Analyze Sex Determination and Genetic Applications: Explain the mechanism of human sex determination, understand the basic principles of genetic engineering, and list preventive measures for human genetic disorders and their eugenic significance.
• Investigate Evolution and Biodiversity: Provide examples of evidence for biological evolution (e.g., fossils), comprehend the chemical origin-of-life hypothesis, and articulate the value (genetic, species, ecosystem) and conservation methods of biodiversity.

🔹 Lesson 3: Harmony of Mind and Body: Modern Perspectives on Healthy Living

Overview: This lesson aims to help ninth-grade students establish a scientific and comprehensive modern concept of health. Starting with defining "what is health," it focuses on the World Health Organization’s (WHO) definition of health and the concept of "sub-health," analyzing the shift from a purely physiological model to the biopsychosocial-medical model. Through case studies involving diet, genetics, and the “Wolf Doctor,” students will understand the multifaceted factors influencing health and recognize the positive effects of scientific exercise on both physiology and psychology, thereby embracing the principle that “health is in your own hands.”

Learning Outcomes:

• Cognitive Level: Accurately state the World Health Organization’s definition of “health” and differentiate between health, disease, and sub-health states.
• Analytical Level: Through case analysis, identify the specific impacts of diet, genetics, lifestyle, and psychological factors on health, and understand the biopsychosocial-medical model.
• Application Level: Recognize the value of aerobic exercise and apply acquired knowledge to reflect on personal lifestyle, formulating initial health management strategies.

🔹 Lesson 4: Immune Defense: Self-Protection and Disease Prevention

Overview: This lesson helps ninth-grade students understand the core functions of the human immune system and uses this foundation to explore the nature, patterns, and prevention of infectious diseases. By studying specific cases such as AIDS and SARS, students will learn to identify the three essential components of infectious disease transmission, understand proper antibiotic use, and appreciate the global contributions of traditional Chinese medicine exemplified by artemisinin, thus cultivating correct public health awareness and healthy habits.

Learning Outcomes:

• Accurately describe the three main functions of the immune system and define infectious diseases along with types of pathogens.
• Through case analysis, identify the three basic stages of disease transmission (source of infection, route of transmission, susceptible population) and propose corresponding preventive measures.
• Understand prevention and control knowledge regarding AIDS and SARS, correctly recognize antibiotic side effects, and explain the scientific significance of artemisinin’s discovery.

🔹 Lesson 5: Safety and Survival: Avoiding Hazards and Emergency First Aid Skills

Overview: This lesson helps ninth-grade students identify and resist hidden dangers in daily life, including the physiological and psychological harms of drugs and tobacco. It also emphasizes emergency response principles during sudden accidents—especially fractures—through creating “first aid cards,” fostering calmness and practical skills during crises and building safety networks at school and home.

Learning Outcomes:

• Cognitive Level: Accurately define drugs, classify them, and list specific harms of smoking on the respiratory system and overall health.
• Skill Level: Master the principle of “on-site immobilization” for fracture first aid and identify fixation methods for different body parts (e.g., upper arm, thigh).
• Application Level: Gather information on various accidents (e.g., burns, drowning) and create practical “first aid information cards” in standard format.

🔹 Lesson 6: Population Pressure: Population Growth and Environmental Carrying Capacity

Overview: This lesson explores the dynamic changes in human population and their impact on Earth’s environment. By learning how to calculate natural population growth rates and analyze population structure (gender and age), students will understand the background of “World Population Day” and grasp the core concept of “environmental carrying capacity,” thereby deeply recognizing the immense pressure rapid population growth exerts on global ecosystems.

Learning Outcomes:

• Accurately calculate natural population growth rate and use formulas to predict population trends.
• Identify and explain changes in age and gender population structures and their socioeconomic implications.
• Understand the meaning of environmental carrying capacity and describe how population growth affects ecosystems and natural resources.

🔹 Lesson 7: Foundations of Energy: Distribution and Development of Natural Resources

Overview: This course helps ninth-grade students systematically understand the distribution patterns of Earth’s natural resources (focusing on land, water, forests, and mineral resources) and the severe crises they face. It further explores energy classification systems, analyzes the limitations of traditional fossil fuels, and proactively examines the principles and application prospects of nuclear energy (fission and fusion) and various renewable energy sources, building a sustainable resource perspective.

Learning Outcomes:

• Resource Distribution and Crises: Describe the distribution characteristics of major natural resources in China and globally, and analyze the causes of water and land resource crises.
• Energy Classification and Nuclear Energy: Master scientific energy classification, differentiate between fission and fusion principles, and understand the current status of nuclear energy development.
• Future Energy Outlook: Identify multiple types of renewable energy and assess their potential in alleviating resource pressures and supporting environmental protection.

🔹 Lesson 8: Green Blueprint: Environmental Issues and Sustainable Development

Overview: This lesson guides students to systematically understand the essence, current status, and response strategies for environmental issues. Content includes categorizing environmental problems (primary vs. secondary), addressing specific challenges facing the globe and China, emphasizing hands-on skills through the “water purification” experiment, and ultimately elevating to the theoretical level of “sustainable development,” clearly outlining China’s legal framework and implementation paths in this domain.

Learning Outcomes:

• Identification and Classification: Accurately distinguish between primary and secondary environmental problems and list major environmental challenges faced globally and in China.
• Experiment and Inquiry: Master the basic steps of simple wastewater purification (neutralization, flocculation, filtration) and understand the principles of physical and chemical purification.
• Theoretical Understanding: Deeply comprehend the definition of sustainable development, its core elements (economic, social, ecological), and China’s legal implementation framework.

🔹 Lesson 9: Light of Technology: Science and Technology Driving Human Civilization

Overview: This lesson aims to help ninth-grade students understand how science and technology—as “the primary productive force”—systematically reshape human civilization. The content spans historical periods from the Stone Age to the nuclear power era, systematically tracing the evolution of three scientific, technological, and industrial revolutions, and detailing cutting-edge applications of rare earth materials, superconductors, nanomaterials, and smart materials. Through case studies of CFCs and DDT, students develop critical thinking and social responsibility toward the negative impacts of technology.

Learning Outcomes:

• Can summarize: Technical characteristics and criteria for historical period divisions (materials, energy, tools), and describe representative markers of each era.
• Can trace: The causal relationships among the three scientific revolutions, technological revolutions, and industrial revolutions, and their profound impacts on human society.
• Can distinguish: Performance characteristics of new materials (rare earth, superconductors, nanomaterials, smart materials) and their typical applications in modern high-tech fields.

🔹 Lesson 10: Digital Interconnection: Computers, Internet, and the Information Society

Overview: This lesson leads students through the transformation of Turing’s mathematical ideal into real-world electronic computers, witnessing the leap in communication technology from telegraph and telephone to global connectivity. We will analyze the components of an information society, understand the global landscape of the four major satellite navigation systems, and delve into how these technologies are reshaping our daily lives and family communication.

Learning Outcomes:

• Describe the evolution logic from Turing machine ideal to von Neumann architecture and the hardware development stages of computers.
• Identify landmark inventions of the electrical communication era and distinguish between major modern communication technologies.
• Accurately list the four global satellite navigation systems and understand the four core elements of information technology (IT).

🔹 Lesson 11: Transportation Revolution: From Steam Power to Intelligent Transport

Overview: This lesson takes students on a journey through the evolution of modern transportation, from the steam power revolution in the early 19th century to 21st-century maglev technology and intelligent transport systems. Covering key milestones in the invention of ships, cars, trains, and airplanes, it focuses on how science and technology (such as thermodynamic theory and electromagnetic levitation) have driven transportation toward higher speed, greater safety, and smarter systems, while analyzing their profound impact on human spatial distance and lifestyle.

Learning Outcomes:

• Recall and Remember: List inventors of ships, cars, trains, and airplanes (e.g., Stephenson, Benz, Wright brothers, Feng Ru) and their landmark achievements.
• Principle Analysis: Understand the scientific principle behind maglev trains’ “non-contact” state (like poles repel, opposite poles attract) and the operational features of expressways.
• Comprehensive Application: Analyze how modern transportation enhances societal efficiency and expands human activity scope, and gain preliminary understanding of the components of intelligent transport systems.

🔹 Lesson 12: Future Homes: Science Empowering Modern Life

Overview: This lesson focuses on how science and technology profoundly transform modern life by improving the three dimensions of “clothing, food, and shelter.” Students will learn about the evolution of fiber materials, the “kitchen revolution” brought by household appliances, and the transition from traditional housing to smart buildings, understanding that technological advancement is the core driver of improved quality of life and social progress.

Learning Outcomes:

• Differentiate the origins and raw material differences between man-made fibers and synthetic fibers.
• Explain the significance of household appliances like irons and washing machines in reducing physical labor and enhancing work efficiency.
• Describe the progression of residential buildings from electrification and automation to intelligence, including their characteristics.