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Below are the objectives for Grade 7.  Click on the link  for students or  for teachers for any objective to see the resources available or to add your own resource.

Home – Science - Grade 7

 

Standard 2: Life

Resources

Benchmark

Indicator

 

A.   Explain that the basic functions of organisms are carried out in cells and groups of specialized cells form tissues and organs; the combination of these cells make up multicellular organisms that have a variety of body plans and internal structures.

 

 

1a.  Recognize that multicellular organisms have a variety of specialized cells, tissues, organs and organ systems that perform specialized functions.

1.b  Identify cells as structure common to all living things.

1.c  Identify levels of organization in life forms from cell to tissue, to organ systems, to organisms.

 

C.   Explain how energy entering the ecosystems as sunlight supports the life of organisms through photosynthesis and the transfer of energy through the interactions of organisms and the environment.

2.   Investigate how organisms or populations may interact with one another through symbiotic relationships and how species have become so adapted to each other that neither could survive without the other (e.g., predator-prey, parasitism, mutualism and commensalisms).

3.   Explain how the number of organisms an ecosystem can support depends on adequate biotic (living) resources (e.g., plants, animals) and abiotic (non-living) resources (e.g., light, water and soil).

4.   Evaluate how overpopulation impacts an ecosystem.

5.   Recognize that some environmental changes occur slowly while others occur rapidly (e.g., forest and pond succession, fires and decomposition).

6.   Summarize the ways that natural occurrences and human activity affect the transfer of energy in Earth’s ecosystems (e.g., fire, hurricanes, roads and oil spills).

7.   Explain that photosynthetic cells convert solar energy into chemical energy that is used to carry on life functions or is transferred to consumers and used to carry on their life functions.

8.   Describe how organisms may interact with one another.

 

D.   Explain how extinction of a species occurs when the environment changes and its adaptive characteristics are insufficient to allow survival (as seen in evidence of the fossil record).

9.   Describe how organisms become extinct.

 

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