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California Science Teachers Association In collaboration with the California Department of Education - page 9 / 50





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  • f.

    Earth 9d- Students know how to analyze published geologic hazard maps of California and know how to use the map’s information to identify evidence of geologic events of the past and predict geologic changes in the future.

  • f.

    Earth 9b- Students know the principal natural hazards in different California regions and the geologic basis of those hazards. (more detail)

  • II.

    Semester 2—Systems of the Earth impact the biosphere Biogeochemical cycles impact life on Earth. To understand these impacts, an examination of the biological, physical, and chemical properties of matter in the biogeochemical cycles needs to be established. The stability of life on earth is closely linked to the water, oxygen, carbon, and nitrogen cycles. Knowledge of these chemical cycles will assist in assessing changes that can affect the dynamic equilibrium of the Earth's biotic community. Organic evolution and shifts in biotic communities occur in the context of the Earth’s constantly changing environments.

    • A.

      Unit Concept #1—Biogeochemical cycles support the Earth’s biotic systems, and important abiotic influences help to govern these biogeochemical cycles. Understanding how chemical bonds form supports the study of these influences. Water, the universal solvent, can produce acidic and alkaline environments within its cycles. Further study will examine how specific molecules affect the water, carbon, and nitrogen cycles. Examples of these molecules are those of oxygen as it forms bonds with either carbon or nitrogen as it flows through the ecosystem.

  • 1.

    Chemistry 2- Biological, chemical, and physical properties of matter result from the ability of atoms to form bonds from electrostatic forces between electrons and protons and between atoms and molecules.

    • a.

      Chemistry 2a- Students know atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic bonds. (Review)

    • b.

      Chemistry 2b- Students know chemical bonds between atoms in molecules such as H2, CH4, NH3, H2CCH2, N2, Cl2, and many large biological molecules are covalent.

    • b.

      Chemistry 2c- Students know salt crystals, such as NaCl, are repeating patterns of positive and negative ions held together by electrostatic attraction.

  • 2.

    Biology 6d- Students know how water, carbon, and nitrogen cycle between abiotic resources and organic matter in the ecosystem and how oxygen cycles through photosynthesis and respiration.

    • a.

      Chemistry 7c- Students know energy is released when a material condenses or freezes and is absorbed when a material evaporates or melts.


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