Texas Essential Knowledge and Skills Teaching Resources

Science 6.5

Matter and energy. The student knows the differences between elements and compounds. The student is expected to: (A) know that an element is a pure substance represented by a chemical symbol and that a compound is a pure substance represented by a chemical formula; (B) recognize that a limited number of the many known elements comprise the largest portion of solid Earth, living matter, oceans, and the atmosphere; and (C) identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change.

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