TEKS: Chapter 112. Science See All Teacher Resources

112.37.c.4

Science concepts. The student knows the relationships of biotic and abiotic factors within habitats, ecosystems, and biomes. The student is expected to:

• (A)  identify native plants and animals using a dichotomous key;

• (B)  assess the role of native plants and animals within a local ecosystem and compare them to plants and animals in ecosystems within four other biomes;

• (C)  diagram abiotic cycles, including the rock, hydrologic, carbon, and nitrogen cycles;

• (D)  make observations and compile data about fluctuations in abiotic cycles and evaluate the effects of abiotic factors on local ecosystems and local biomes;

• (E)  measure the concentration of solute, solvent, and solubility of dissolved substances such as dissolved oxygen, chlorides, and nitrates and describe their impact on an ecosystem;

• (F)  predict how the introduction or removal of an invasive species may alter the food chain and affect existing populations in an ecosystem;

• (G)  predict how species extinction may alter the food chain and affect existing populations in an ecosystem; and

• (H)  research and explain the causes of species diversity and predict changes that may occur in an ecosystem if species and genetic diversity is increased or reduced.