Speaker at the earth knowledge primary school: date: a catalogue of the earth provides an overview of the earth's natural environment, the human environment and the earth's disasters and environmental problems. Park 01 earth outlines the shape of the earth as an elliptical or near sphere, with an equatorial radius slightly larger than the extreme radius. The equatorial radius of the earth in shape is about 6378 km, the polar radius is about 6357 km and the average radius is about 6371 km. The size of the earth is due to its rotation, and the equator is slightly agitated, resulting in the earth's flatting rate of about 1/298. The shape and size of flat earth rotate around the sun, with an elliptical orbit with a cycle of about one year. The earth rotates around its own axis, with a rotational cycle of about one day and a rotational direction from west to east. The rotation of the earth has resulted in the alternation of day and night and the rise and fall of the sun and moon. The movement of the earth, which is a phenomenon of the earth's rotation, and the inner layers of the earth's cylindrical structure of the earth's 010203, consist of the earth's core, the mantle and the crust, which consist mainly of iron and nickel, the mantle of liquid magma and the crust of the earth of rock. The outer circle of the earth comprises the atmosphere, the hydrosphere and the biosphere, which consists mainly of nitrogen and oxygen, the hydrosphere includes water bodies such as oceans, lakes and rivers, and the biosphere includes all life on earth and its living environment. The interactions between the earth's circles are combined to maintain the earth's ecological balance through interactions between the earth's circles through the flow of materials and energy. The earth's magnetic field and the gravity field 01 are within the earth's interior, with the magnetic antarctic and the magnetic arctic located close to the geo-arctic and geo-antarctic, respectively, and the earth's magnetic field is shielded from electrical particles in the atmosphere. The earth produces gravity for all objects, which is manifested in gravity near the surface of the earth. Gravity is the force of the earth to attract objects and is one of the important factors in the stability of objects on earth. The earth's magnetic and gravity fields work together to protect the earth's atmosphere and biosphere from solar and cosmic rays. The global warming of the earth's natural environment by climate change is one of the most significant current climate changes, mainly caused by increased greenhouse gas concentrations in the atmosphere due to human activity. The atmospheric structure of the earth's atmosphere consists of troposphere, stratosphere, mesosphere, thermosphere and outer layer, with different layers of characteristics and different impacts on climate and human activity. The main climate types are tropical rainforests, savannah climates, desert climates, temperate continental and polar climates, each of which has unique characteristics and distribution patterns. The atmosphere and climate-type watercourses, including oceans, lakes, rivers, groundwater, glaciers and moisture in the atmosphere, are among the most important resources on earth. Water resources are unevenly distributed globally, with most of the water resources concentrated in a few countries and areas facing severe water shortages. The water distribution cycle is one of the most important cycles on earth, including evaporation, precipitation, surface runoff, underground infiltration and evaporation of plants, maintaining the balance of the earth's ecosystems. The water cycling and water resources distribution biosphere and biodiversity biosphere constitute the biosphere, including all life on earth and its living environment, and are one of the most complex systems on earth. Biodiversity biosphere and climate biodiversity are among the important features of the biosphere, including three levels of species diversity, genetic diversity and ecosystem diversity. There is a close interaction between the biosphere and the climate, where biological activity has a significant impact on the climate, as well as on the distribution and variety of organisms. The main types of soil formation include black soil, yellow soil, red soil, sand and saline soil, each of which has unique characteristics and suitable plants for cultivation. Soil-type rock-type rocks are divided into three main groups, namely, pyrotechnic, sedimentary and variable rock, each of which has unique causes and characteristics. Soils are formed by processes such as rock weathering, plant debris decomposition and bioactivation and are an important foundation for plant growth. The earth's soil and rock 03 human-environment population distribution and ethnicity make up the world's population distribution mainly in asia, africa and europe, where asia has the largest population. Population density decreases from city to city, is densely populated and is sparsely populated. The ethnic group comprises a large number of ethnic groups around the world, with distinctive characteristics such as the han, hindus, germans, etc. Ethnic groups are mainly located in specific regions and countries, but some are also spread across borders. Political systems include monarchy, republicanism, socialistism, etc., with different political systems. The administrative division of the state divides the territory into a number of administrative districts, such as provinces, states, counties, etc., depending on political, economic and geographical factors. The administrative structures and the distribution of competencies vary from one country to another, but are responsible for the day-to-day affairs of the state. Citizens participating in political participation participate in the political life of the country through elections, political participation and representation, and express their will and aspirations. The level of economic development of countries varies from one political system to another and can be divided into developed and developing countries. Industrial structures vary from country to country, but are constantly being adjusted and upgraded, including in agriculture, industry and services. Resources, technology, labour, markets, etc. Are important factors affecting economic development. Economic cooperation among countries, including through trade, investment and so on, is mutually beneficial. The factors of industrial structural economic development during the period of economic and industrial structural development are the factors of the economic cooperation for economic development. The cultural heritage and linguistic and linguistic culture of countries have a long history of transmission through education, art and folklore. Language and language are important vehicles of culture, and each country has its own official language and language. Cultural diversity is characterized by the diversity of cultures around the world. Cultural exchanges promote understanding, friendship and cooperation among countries through cultural exchanges. 04 the earth's disasters and environmental earthquakes were the result of earthquakes caused by the rapid release of energy from the earth's crust, which could lead to the collapse of buildings, loss of life and damage to property. Tsunamis are huge waves caused by seafloor earthquakes, volcanic eruptions or underwater collapses, which cause enormous damage to coastal areas. Landslides and mudslides are conditions in which the earth or rocky body on the slopes has slipped along a certain gravitational line, while mudslides are disasters that combine landslides with water flows. Volcanic volcanoes are a common geological phenomenon on earth, with magma, ash and gases sprayed during volcanic eruptions, with serious effects on the surrounding environment. Natural disasters such as earthquakes, volcanoes and tsunamis, such as climate change 01020304, and greenhouse gases such as greenhouse gases such as carbon dioxide and methane, which are global warming, form gas layers similar to glass masks in the atmosphere, leading to an increase in the temperature of the earth. The climate system of the climate system, 02040301, consists of various parts of the atmosphere, the hydrosphere, the biosphere and the rocky circle, which interact to influence the earth's climate. Global warming has led to a range of environmental problems such as melting glaciers, rising sea levels and increasing extreme weather events. Climate modelling scientists use climate models to predict future climate change trends and provide a scientific basis for policy formulation. Industrial air pollution emissions, traffic tail gas and coal combustion are major sources of air pollution, with serious impacts on human health and the ecological environment. Acid rain is caused by the combination of pollutants such as sulphur dioxide and nitrogen oxides in the atmosphere with water vapour, causing serious damage to buildings, water bodies and ecosystems. Industrial effluents, agricultural fertilizers and pesticides, and household sewage discharges into water bodies lead to deterioration in water quality and affect human and biological survival. Water pollution poses a serious threat to human drinking water security, leading to water shortages and a water crisis. The loss of safe biodiversity of water-contaminated acid rain drinking water and the ecological conservation of biodiversity are the richness of the planet's biological species and the diversity of ecosystems, and are important foundations for maintaining ecological balance. Ecosystem ecosystems are dynamic equilibrium systems that interact with biological communities and their abiotic environments. Many endangered species are at risk of extinction as a result of habitat destruction, overexploitation and environmental pollution. The establishment of protected natural areas, the strengthening of laws and regulations and the promotion of ecological education are effective measures to protect biodiversity and ecosystems. Remote access to earth surface information, including terrain, topography, vegetation, water bodies, etc., is provided by remote sensing technologies for the exploration of earth's science and methods through satellites, aircraft and other carriers. Gis systems for integration, storage, analysis and display of geographic information are widely used in areas such as urban planning, resource surveys and so forth. Remote sensing technology and gis applications for geological exploration seek out and assess underground mineral resources through geological surveys, geophysical exploration, etc. Mineral resources development technologies, including mining, mining and other technologies, increase the efficiency of their exploitation and utilization. The geological exploration and mineral resource development technology uses equipment such as sonar, radar, etc. To detect marine topography, tectonics and marine life. Marine exploration, which includes deep-sea minerals and biological resources, is an important area for future resource development. The application of space science and technology in the development of deep-sea resources for ocean exploration and the development of deep-sea resources in earth sciences has brought human beings into space, conducted space experiments, earth observations, etc., and promoted earth science research. Satellite remote sensing provides satellite access to surface information for environmental monitoring, disaster warning, etc。our home on earth is valued for encouraging walking, riding or using public transport to reduce the use of private cars. Green travel society waste classification to promote resource recycling and reduce environmental pollution. Waste classification 01020304 saves electricity and water and reduces unnecessary energy consumption and emissions. Energy-saving emission reductions promote vegetarian food, reduce meat consumption and reduce carbon emissions. Low-carbon diets advocate for green low-carbon lifestyles to participate in environmental public goods, increase environmental awareness to participate actively in tree planting, increase green vegetation and improve the ecological environment. Environmental advocacy raises public awareness and awareness of environmental issues through advocacy, education, etc. Environmental practices contribute to the earth's homeland by engaging in environmental practices such as garbage removal and water pollution management. Environmental organizations participate in environmental organizations or groups to promote and protect the environment. Learning from earth science understands the formation, evolution, construction and natural environment of the earth. To understand global environmental issues and their impact on the earth by focusing on environmental issues such as global climate change and biodiversity conservation. The dissemination of scientific knowledge spreads earth science to people around us through lectures, science events, etc. To develop scientific literacy to improve scientific literacy and develop rational thinking and problem solving. Learning and disseminating scientific knowledge of the earth, raising awareness of global issues, protecting the planet's home from global climate change trends and taking appropriate measures to reduce greenhouse gas emissions. Biodiversity conservation is actively involved in biodiversity conservation activities, maintaining ecological balance and biodiversity. Resource conservation and rational use of the earth's resources and promotion of conservation and recycling for sustainable development. Environmental protection cooperation strengthens international cooperation and exchange to jointly address global environmental problems and protect the planet's homeland. Thanks for watching thanks
