Land and Soil in the Ecosystem
Students use an apple to represent the Earth and discover how our land resources are used. Through critical thinking, students discover why topsoil is a nonrenewable resource, the importance of soil to our food supply, and factors that impact topsoil distribution in different regions.

Background
Lesson Activities
Recommended Companion Resources
Credits
Author
Debra Spielmaker and Andrea Gardner | National Center for Agricultural Literacy (NCAL)
Acknowledgements
The calculations for the apple demonstration were compiled by Population Education and can be found in their lesson plan, Earth: The Apple of our Eye.
Sources
- https://www.soilassociation.org/causes-campaigns/save-our-soil/10-soil-facts/
- https://ourworldindata.org/global-land-for-agriculture
- https://www.sciencedirect.com/science/article/abs/pii/S2211912416300013
- https://www.beefitswhatsfordinner.com/raising-beef/production-story
- https://www.fao.org/3/x5304e/x5304e03.htm
Standards
Texas Content Area Standards
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Principles of Agriculture, Food, and Natural Resources: 130.2.c.1
The student demonstrates professional standards/employability skills as required by business and industry. The student is expected to:
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.1.B: apply competencies related to resources, information, interpersonal skills, problem solving, critical thinking, and systems of operation in agriculture, food, and natural resources.
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Principles of Agriculture, Food, and Natural Resources: 130.2.c.4
The student explains the historical, current, and future significance of the agriculture, food, and natural resources industry. The student is expected to:
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.4.F: compare and contrast issues impacting agriculture, food, and natural resources such as biotechnology, employment, safety, environment, and animal welfare issues.
- Principles, of Agriculture, Food, and Natural Resources: 130.2.c.4.D: identify potential future scenarios for agriculture, food, and natural resources systems, including global impacts.
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Principles of Agriculture, Food, and Natural Resources: 130.2.c.6
The student demonstrates appropriate personal and communication skills. The student is expected to:
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.6.A: demonstrate written and oral communication skills appropriate for formal and informal situations such as prepared and extemporaneous presentations.
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.6.B: demonstrate effective listening skills appropriate for formal and informal situations.
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Principles of Agriculture, Food, and Natural Resources: 130.2.c.10
The student develops technical knowledge and skills related to soil systems. The student is expected to:
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.10.A: identify the components and properties of soils.
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.10.B: identify and describe the process of soil formation.
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Principles of Agriculture, Food, and Natural Resources: 130.2.c.15
The student explains the relationship between agriculture, food, and natural resources and the environment. The student is expected to:
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.15.A: determine the effects of agriculture, food, and natural resources upon safety, health, and the environment.
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.15.B: identify regulations relating to safety, health, and environmental systems in agriculture, food, and natural resources.
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.15.C: identify and design methods to maintain and improve safety, health, and environmental systems in agriculture, food, and natural resources.
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.15.D: research and analyze alternative energy sources that stem from or impact agriculture, food, and natural resources.
- Principles of Agriculture, Food, and Natural Resources: 130.2.c.15.E: evaluate energy and water conservation methods.
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ELA: 6.110.22.b.1
Developing and sustaining foundational language skills: listening, speaking, discussion, and thinking- oral language. The student develops oral language through listening, speaking, and discussion.
- ELA: 6.1.D: The student is expected to participate in student-led discussions by eliciting and considering suggestions from other group members, taking notes, and identifying points of agreement and disagreement.
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ELA: 7.110.23.b.1
Developing and sustaining foundational language skills: listening, speaking, discussion, and thinking- oral language. The student develops oral language through listening, speaking, and discussion.
- ELA: 7.1.D: The student is expected to engage in meaningful discourse and provide and accept constructive feedback from others.
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ELA: 7.110.23.b.5
Comprehension skills: listening, speaking, reading, writing, and thinking using multiple texts. The student uses metacognitive skills to both develop and deepen comprehension of increasingly complex texts.
- ELA: 7.110.23.b.5.H: synthesize information to create new understanding
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ELA: 8.110.24.b.1
Developing and sustaining foundational language skills: listening, speaking, discussion, and thinking- oral language. The student develops oral language through listening, speaking, and discussion.
- ELA: 8.1.D: The student is expected to participate collaboratively in discussions, plant agendas with clear goals and deadlines, set time limits for speakers, take notes, and vote on key issues.
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Math: 6.111.26.b.1
Mathematical process standards. The student uses mathematical processes to acquire and demonstrate mathematical understanding.
- Math: 6.1.A: The student is expected to apply mathematics to problems arising in everyday life, society, and the workplace.
- Math: 6.1.C: The student is expected to select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems.
- Math: 6.111.26.b.1.A: apply mathematics to problems arising in everyday life, society, and the workplace
- Math: 6.111.26.b.1.D: communicate mathematical ideas, reasoning, and their implications using multiple representations, including symbols, diagrams, graphs, and language as appropriate
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Math: 6.111.26.b.3
Number and operations. The student applies mathematical process standards to represent addition, subtraction, multiplication, and division while solving problems and justifying solutions.
- Math: 6.3.D: The student is expected to add, subtract, multiply, and divide integers fluently.
- Math: 6.3.E: The student is expected to multiply and divide positive rational numbers fluently.
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Math: 7.111.27.b.1
Mathematical process standards. The student uses mathematical processes to acquire and demonstrate mathematical understanding.
- Math: 7.1.A: The student is expected to apply mathematics to problems arising in everyday life, society, and the workplace.
- Math: 7.1.C: The student is expected to select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems.
- Math: 7.111.27.b.1.A: apply mathematics to problems arising in everyday life, society, and the workplace
-
Math: 7.111.27.b.3
Number and operations. The student applies mathematical process standards to add, subtract, multiply, and divide while solving problems and justifying solutions.
- Math: 7.3.A: The student is expected to add, subtract, multiply, and divide rational numbers fluently.
- Math: 7.3.B: The student is expected to apply and extend previous understandings of operations to solve problems using addition, subtraction, multiplication, and division of rational numbers.
-
Math: 8.111.28.b.1
Number and operations. The student applies mathematical process standards to add, subtract, multiply, and divide while solving problems and justifying solutions.
- Math: 8.1.A: The student is expected to apply mathematics to problems arising in everyday life, society, and the workplace.
- Math: 8.1.C: The student is expected to select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems.
- Math: 8.111.28.b.1.A: apply mathematics to problems arising in everyday life, society, and the workplace
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Social Studies: 6.113.18.c.19
Social studies skills. The student applies critical-thinking skills to organize and use information acquired through established research methodologies from a variety of valid sources, including technology. The student is expected to:
- Social Studies: 6.113.18.c.19.C: organize and interpret information from outlines, reports, databases, and visuals, including graphs, charts, timelines, and maps
-
Social Studies: 6.113.18.c.21
Social studies skills. The student communicates in written, oral, and visual forms. The student is expected to:
- Social Studies: 6.113.18.c.21.C: express ideas orally based on research and experiences
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Science: 6.112.26.b.1
Scientific and engineering practices. The student, for at least 40% of instructional time, asks questions, identifies problems, and plans and safely conducts classroom, laboratory, and field investigations to answer questions, explain phenomena, or design solutions using appropriate tools and models. The student is expected to:
- Science: 6.112.26.b.1.A: ask questions and define problems based on observations or information from text, phenomena, models, or investigations
- Science: 6.112.26.b.1.B: use scientific practices to plan and conduct descriptive, comparative, and experimental investigations and use engineering practices to design solutions to problems
- Science: 6.112.26.b.1.E: collect quantitative data using the International System of Units (SI) and qualitative data as evidence;
- Science: 6.112.26.b.1.F: construct appropriate tables, graphs, maps, and charts using repeated trials and means to organize data;
- Science: 6.112.26.b.1.G: develop and use models to represent phenomena, systems, processes, or solutions to engineering problems; and
-
Science: 6.112.26.b.2
Scientific and engineering practices. The student analyzes and interprets data to derive meaning, identify features and patterns, and discover relationships or correlations to develop evidence-based arguments or evaluate designs. The student is expected to:
- Science: 6.112.26.b.2.A: identify advantages and limitations of models such as their size, scale, properties, and materials;
- Science: 6.112.26.b.2.B: analyze data by identifying any significant descriptive statistical features, patterns, sources of error, or limitations;
- Science: 6.112.26.b.2.C: use mathematical calculations to assess quantitative relationships in data; and
- Science: 6.112.26.b.2.D: evaluate experimental and engineering designs.
-
Science: 6.112.26.b.3
Scientific and engineering practices. The student develops evidence-based explanations and communicates findings, conclusions, and proposed solutions. The student is expected to:
- Science: 6.112.26.b.3.A: develop explanations and propose solutions supported by data and models and consistent with scientific ideas, principles, and theories;
- Science: 6.112.26.b.3.B: communicate explanations and solutions individually and collaboratively in a variety of settings and formats; and
-
Science: 6.112.26.b.4
Scientific and engineering practices. The student knows the contributions of scientists and recognizes the importance of scientific research and innovation on society. The student is expected to:
- Science: 6.112.26.b.4.C: research and explore resources such as museums, libraries, professional organizations, private companies, online platforms, and mentors employed in a science, technology, engineering, and mathematics (STEM) field to investigate STEM careers.
-
Science: 6.112.26.b.5
Recurring themes and concepts. The student understands that recurring themes and concepts provide a framework for making connections across disciplines. The student is expected to:
- Science: 6.112.26.b.5.A: identify and apply patterns to understand and connect scientific phenomena or to design solutions;
- Science: 6.112.26.b.5.D: examine and model the parts of a system and their interdependence in the function of the system;
- Science: 6.112.26.b.5.G: analyze and explain how factors or conditions impact stability and change in objects, organisms, and systems.
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Social Studies: 7.113.19.c.20
Social studies skills. The student applies critical-thinking skills to organize and use information acquired through established research methodologies from a variety of valid sources, including technology. The student is expected to:
- Social Studies: 7.113.19.c.20.C: organize and interpret information from outlines, reports, databases, and visuals, including graphs, charts, timelines, and maps
- Social Studies: 7.113.19.c.20.E: formulate and communicate visually, orally, or in writing a claim supported by evidence and reasoning related to a social studies topic
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Science: 6.112.26.b.10
Earth and space. The student understands the rock cycle and the structure of Earth. The student is expected to:
- Science: 6.112.26.b.10.A: differentiate between the biosphere, hydrosphere, atmosphere, and geosphere and identify components of each system;
-
Science: 6.112.26.b.11
Earth and space. The student understands how resources are managed. The student is expected to:
- Science: 6.112.26.b.11.A: research and describe why resource management is important in reducing global energy poverty, malnutrition, and air and water pollution; and
- Science: 6.112.26.b.11.B: explain how conservation, increased efficiency, and technology can help manage air, water, soil, and energy resources.
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Science: 6.112.26.b.12
Organisms and environments. The student knows that interdependence occurs between living systems and the environment. The student is expected to:
- Science: 6.112.26.b.12.A: investigate how organisms and populations in an ecosystem depend on and may compete for biotic factors such as food and abiotic factors such as availability of light and water, range of temperatures, or soil composition;
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Social Studies: 8.113.20.c.29
Social studies skills. The student applies critical-thinking skills to organize and use information acquired through established research methodologies from a variety of valid sources, including technology. The student is expected to:
- Social Studies: 8.113.20.c.29.C: organize and interpret information from outlines, reports, databases, and visuals, including graphs, charts, timelines, and maps
- Social Studies: 8.113.20.c.29.E: formulate and communicate visually, orally, or in writing a claim supported by evidence and reasoning related to a social studies topic
-
Science: 7.112.27.b.1
Scientific and engineering practices. The student, for at least 40% of instructional time, asks questions, identifies problems, and plans and safely conducts classroom, laboratory, and field investigations to answer questions, explain phenomena, or design solutions using appropriate tools and models. The student is expected to:
- Science: 7.112.27.b.1.A: ask questions and define problems based on observations or information from text, phenomena, models, or investigations;
- Science: 7.112.27.b.1.B: use scientific practices to plan and conduct descriptive, comparative, and experimental investigations and use engineering practices to design solutions to problems;
- Science: 7.112.27.b.1.E: collect quantitative data using the International System of Units (SI) and qualitative data as evidence;
- Science: 7.112.27.b.1.F: construct appropriate tables, graphs, maps, and charts using repeated trials and means to organize data
- Science: 7.112.27.b.1.G: develop and use models to represent phenomena, systems, processes, or solutions to engineering problems; and
-
Science: 7.112.27.b.2
Scientific and engineering practices. The student analyzes and interprets data to derive meaning, identify features and patterns, and discover relationships or correlations to develop evidence-based arguments or evaluate designs. The student is expected to:
- Science: 7.112.27.b.2.A: identify advantages and limitations of models such as their size, scale, properties, and materials;
- Science: 7.112.27.b.2.B: analyze data by identifying any significant descriptive statistical features, patterns, sources of error, or limitations;
- Science: 7.112.27.b.2.C: use mathematical calculations to assess quantitative relationships in data; and
- Science: 7.112.27.b.2.D: evaluate experimental and engineering designs.
-
Science: 7.112.27.b.3
Scientific and engineering practices. The student develops evidence-based explanations and communicates findings, conclusions, and proposed solutions. The student is expected to:
- Science: 7.112.27.b.3.A: develop explanations and propose solutions supported by data and models and consistent with scientific ideas, principles, and theories;
- Science: 7.112.27.b.3.B: communicate explanations and solutions individually and collaboratively in a variety of settings and formats; and
-
Science: 7.112.27.b.4
Scientific and engineering practices. The student knows the contributions of scientists and recognizes the importance of scientific research and innovation on society. The student is expected to:
- Science: 7.112.27.b.4.C: research and explore resources such as museums, libraries, professional organizations, private companies, online platforms, and mentors employed in a science, technology, engineering, and mathematics (STEM) field to investigate STEM careers
-
Science: 7.112.27.b.5
Recurring themes and concepts. The student understands that recurring themes and concepts provide a framework for making connections across disciplines. The student is expected to:
- Science: 7.112.27.b.5.A: identify and apply patterns to understand and connect scientific phenomena or to design solutions;
- Science: 7.112.27.b.5.D: examine and model the parts of a system and their interdependence in the function of the system;
- Science: 7.112.27.b.5.G: analyze and explain how factors or conditions impact stability and change in objects, organisms, and systems.
-
Science: 7.112.27.b.14
Organisms and environments. The student knows how the taxonomic system is used to describe relationships between organisms. The student is expected to:
- Science: 7.112.27.b.14.B: describe the characteristics of the recognized kingdoms and their importance in ecosystems such as bacteria aiding digestion or fungi decomposing organic matter.
-
Science: 8.112.28.b.1
Scientific and engineering practices. The student, for at least 40% of instructional time, asks questions, identifies problems, and plans and safely conducts classroom, laboratory, and field investigations to answer questions, explain phenomena, or design solutions using appropriate tools and models. The student is expected to:
- Science: 8.112.28.b.1.A: ask questions and define problems based on observations or information from text, phenomena, models, or investigations;
- Science: 8.112.28.b.1.B: use scientific practices to plan and conduct descriptive, comparative, and experimental investigations and use engineering practices to design solutions to problems;
- Science: 8.112.28.b.1.E: collect quantitative data using the International System of Units (SI) and qualitative data as evidence;
- Science: 8.112.28.b.1.F: construct appropriate tables, graphs, maps, and charts using repeated trials and means to organize data;
- Science: 8.112.28.b.1.G: develop and use models to represent phenomena, systems, processes, or solutions to engineering problems; and
-
Science: 8.112.28.b.2
Scientific and engineering practices. The student analyzes and interprets data to derive meaning, identify features and patterns, and discover relationships or correlations to develop evidence-based arguments or evaluate designs. The student is expected to:
- Science: 8.112.28.b.2.A: identify advantages and limitations of models such as their size, scale, properties, and materials;
- Science: 8.112.28.b.2.B: analyze data by identifying any significant descriptive statistical features, patterns, sources of error, or limitations;
- Science: 8.112.28.b.2.C: use mathematical calculations to assess quantitative relationships in data; and
- Science: 8.112.28.b.2.D: evaluate experimental and engineering designs.
-
Science: 8.112.28.b.3
Scientific and engineering practices. The student develops evidence-based explanations and communicates findings, conclusions, and proposed solutions. The student is expected to:
- Science: 8.112.28.b.3.A: develop explanations and propose solutions supported by data and models and consistent with scientific ideas, principles, and theories;
- Science: 8.112.28.b.3.B: communicate explanations and solutions individually and collaboratively in a variety of settings and formats; and
-
Science: 8.112.28.b.4
Scientific and engineering practices. The student knows the contributions of scientists and recognizes the importance of scientific research and innovation on society. The student is expected to
- Science: 8.112.28.b.4.C: research and explore resources such as museums, libraries, professional organizations, private companies, online platforms, and mentors employed in a science, technology, engineering, and mathematics (STEM) field to investigate STEM careers.
-
Science: 8.112.28.b.5
Recurring themes and concepts. The student understands that recurring themes and concepts provide a framework for making connections across disciplines. The student is expected to:
- Science: 8.112.28.b.5.A: identify and apply patterns to understand and connect scientific phenomena or to design solutions;
- Science: 8.112.28.b.5.D: examine and model the parts of a system and their interdependence in the function of the system;
- Science: 8.112.28.b.5.G: analyze and explain how factors or conditions impact stability and change in objects, organisms, and systems.
-
Science: 8.112.28.b.12
Organisms and environments. The student understands stability and change in populations and ecosystems. The student is expected to:
- Science: 8.112.28.b.12.A: explain how disruptions such as population changes, natural disasters, and human intervention impact the transfer of energy in food webs in ecosystems;
- Science: 8.112.28.b.12.B: describe how primary and secondary ecological succession affect populations and species diversity after ecosystems are disrupted by natural events or human activity; and
- Science: 8.112.28.b.12.C: describe how biodiversity contributes to the stability and sustainability of an ecosystem and the health of the organisms within the ecosystem.
-
Science: 7.112.27.b.11
Earth and space. The student understands how human activity can impact the hydrosphere. The student is expected to:
- Science: 7.112.27.b.11.A: analyze the beneficial and harmful influences of human activity on groundwater and surface water in a watershed; and
- Science: 7.112.27.b.11.B: describe human dependence and influence on ocean systems and explain how human activities impact these systems.
-
ELA: 6.110.22.b.5
Comprehension skills: listening, speaking, reading, writing, and thinking using multiple texts. The student uses metacognitive skills to both develop and deepen comprehension of increasingly complex texts. The student is expected to:
- ELA: 6.110.22.b.5.H: synthesize information to create new understanding
-
ELA: 8.110.24.b.5
Comprehension skills: listening, speaking, reading, writing, and thinking using multiple texts. The student uses metacognitive skills to both develop and deepen comprehension of increasingly complex texts. The student is expected to:
- ELA: 8.110.24.b.5.H: synthesize information to create new understanding
-
Math: 6.111.26.b.4
Proportionality. The student applies mathematical process standards to develop an understanding of proportional relationships in problem situations. The student is expected to:
- Math: 6.111.26.b.4.E: represent ratios and percents with concrete models, fractions, and decimals