Matter+and+Energy

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 interaction****s**__.)

(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


 * (A) describe the structure of atoms, including the masses, electrical charges, and locations, of protons and neutrons in the nucleus and electrons in the electron cloudmedia type="youtube" key="EdgYWHkqxUo" width="407" height="337"
 * (B) identify that protons determine an element’s identity and valence electrons determine its chemical properties, including reactivity; (Readiness Standard)
 * (C) interpret the arrangement of the Periodic Table, including groups and periods, to explain how properties are used to classify elements; (Readiness Standard
 * (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) media type="youtube" key="_B735turDoM" width="425" height="350"
 * (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) media type="youtube" key="_B735turDoM" width="425" height="350"


 * (E) investigate how evidence of chemical reactions indicate that new substances with different properties are formed; and (Readiness Standard) media type="youtube" key="cBy4Q6A8Hfw" width="425" height="350"
 * (F) recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass. (Supporting Standard)

(7.5) Matter and energy. The student knows that interactions occur between matter and energy. The student is expected to


 * (C) diagram the flow of energy through living systems, including food chains, food webs, and energy pyramids. (Supporting Standard)

(7.6) Matter and energy. The student knows that matter has physical and chemical properties and can undergo physical and chemical changes. The student is expected to


 * (A) identify that organic compounds contain carbon and other elements such as hydrogen, oxygen, phosphorus, nitrogen, or sulfur; and (Supporting Standard)
 * <span style="font-family: Verdana,Geneva,sans-serif; font-size: 120%;">(B) distinguish between physical and chemical changes in matter in the digestive system. (Supporting Standard)

<span style="font-family: Verdana,Geneva,sans-serif; font-size: 120%;">(6.5) Matter and energy. The student knows the differences between elements and compounds. The student is expected to


 * <span style="font-family: Verdana,Geneva,sans-serif; font-size: 120%;">(C) differentiate between elements and compounds on the most basic level. (Supporting Standard)

<span style="font-family: Verdana,Geneva,sans-serif; font-size: 120%;">(6.6) Matter and energy. The student knows matter has physical properties that can be used for classification. The student is expected to


 * <span style="font-family: Verdana,Geneva,sans-serif; font-size: 120%;">(A) compare metals, nonmetals, and metalloids using physical properties such as luster, conductivity, or malleability; and (Supporting Standard)
 * <span style="font-family: Verdana,Geneva,sans-serif; font-size: 120%;">(B) calculate density to identify an unknown substance.(Supporting Standard)