Populations and Ecosystems

Life Science
Populations and Ecosystems

National Standards State Standards SFUSD Standards

C4a* A population consists of all individuals of a species that occur together at a given place and time. All populations living together and the physical factors with which they interact compose an ecosystem. NOT PRESENT IN STATE STANDARDS Content Standard 16 (partial): Students understand that food provides fuel and building materials for all organisms. Plants make their own food by using energy directly from the sun, while animals ingest other organisms to obtain energy.

C4b* Populations of organisms can be categorized by the function they serve in an ecosystem. Plants and some micro-organisms are producers--they make their own food. All animals, including humans, are consumers, which obtain food by eating other organisms. Decomposers, primarily bacteria and fungi, are consumers that use waste materials and dead organisms for food. Food webs identify the relationships among producers, consumers, and decomposers in an ecosystem. 6.5c. populations of organisms can be categorized by the functions they serve in an ecosystem.
6.5d. different kinds of organisms may play similar ecological roles in similar biomes. (partial)
Content Standard 16 (partial): Students understand that food provides fuel and building materials for all organisms. Plants make their own food by using energy directly from the sun, while animals ingest other organisms to obtain energy.

C4c* For ecosystems, the major source of energy is sunlight. Energy entering ecosystems as sunlight is transferred by producers into chemical energy through photosynthesis. That energy then passes from organism to organism in food webs. 6.5. Organisms in ecosystems exchange energy and nutrients among themselves and with the environment.
6.5b. over time, matter is transferred from one organism to others in the food web, and between organisms and the physical environment.
6.5a. energy entering ecosystems as sunlight is transferred by producers into chemical energy through photosynthesis, and then from organism to organism in food webs.
Content Standard 16: Students understand that food provides fuel and building materials for all organisms. Plants make their own food by using energy directly from the sun, while animals ingest other organisms to obtain energy.

C4d* The number of organisms an ecosystem can support depends on the resources available and abiotic factors, such as quantity of light and water, range of temperatures, and soil composition. Given adequate biotic and abiotic resources and no disease or predators, populations (including humans) increase at rapid rates. Lack of resources and other factors, such as predation and climate, limit the growth of populations in specific niches in the ecosystem. 6.5e. the number and types of organisms an ecosystem can support depends on the resources available and abiotic factors, such as quantity of light and water, range of temperatures, and soil composition. NOT PRESENT IN SFUSD STANDARDS

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9/30/99

National Standards	State Standards	SFUSD Standards
C4a* A population consists of all individuals of a species that occur together at a given place and time. All populations living together and the physical factors with which they interact compose an ecosystem.	NOT PRESENT IN STATE STANDARDS	Content Standard 16 (partial): Students understand that food provides fuel and building materials for all organisms. Plants make their own food by using energy directly from the sun, while animals ingest other organisms to obtain energy.
C4b* Populations of organisms can be categorized by the function they serve in an ecosystem. Plants and some micro-organisms are producers--they make their own food. All animals, including humans, are consumers, which obtain food by eating other organisms. Decomposers, primarily bacteria and fungi, are consumers that use waste materials and dead organisms for food. Food webs identify the relationships among producers, consumers, and decomposers in an ecosystem.	6.5c. populations of organisms can be categorized by the functions they serve in an ecosystem. 6.5d. different kinds of organisms may play similar ecological roles in similar biomes. (partial)	Content Standard 16 (partial): Students understand that food provides fuel and building materials for all organisms. Plants make their own food by using energy directly from the sun, while animals ingest other organisms to obtain energy.
C4c* For ecosystems, the major source of energy is sunlight. Energy entering ecosystems as sunlight is transferred by producers into chemical energy through photosynthesis. That energy then passes from organism to organism in food webs.	6.5. Organisms in ecosystems exchange energy and nutrients among themselves and with the environment. 6.5b. over time, matter is transferred from one organism to others in the food web, and between organisms and the physical environment. 6.5a. energy entering ecosystems as sunlight is transferred by producers into chemical energy through photosynthesis, and then from organism to organism in food webs.	Content Standard 16: Students understand that food provides fuel and building materials for all organisms. Plants make their own food by using energy directly from the sun, while animals ingest other organisms to obtain energy.
C4d* The number of organisms an ecosystem can support depends on the resources available and abiotic factors, such as quantity of light and water, range of temperatures, and soil composition. Given adequate biotic and abiotic resources and no disease or predators, populations (including humans) increase at rapid rates. Lack of resources and other factors, such as predation and climate, limit the growth of populations in specific niches in the ecosystem.	6.5e. the number and types of organisms an ecosystem can support depends on the resources available and abiotic factors, such as quantity of light and water, range of temperatures, and soil composition.	NOT PRESENT IN SFUSD STANDARDS