Texas Assessments Standards (STAAR)
TX.STAAR.8. STAAR Grade 8 Science Assessment
Reporting Category 1: Matter and Energy - The student will demonstrate an understanding of the properties of matter and energy and their interactions.
(6.5) Matter and energy. The student knows the differences between elements and compounds. The student is expected to:
6.5 (C) Differentiate between elements and compounds on the most basic level. Supporting Standard (STAAR)
(8.5) Matter and energy. The student knows that matter is composed of atoms and has chemical and physical properties. The student is expected to:
8.5 (B) Identify that protons determine an element's identity and valence electrons determine its chemical properties, including reactivity. Readiness Standard (STAAR)
8.5 (D) Recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts. Readiness Standard (STAAR)