TEKS: Chapter 112. Science See All Teacher Resources

112.38.c.7

(7) Science concepts. The student knows that changes in matter affect everyday life. The student is expected to:

• (A) investigate changes of state as it relates to the arrangement of particles of matter and energy transfer; 
• (B) recognize that chemical changes can occur when substances react to form different
  substances and that these interactions are largely determined by the valence electrons; 
• (C) demonstrate that mass is conserved when substances undergo chemical change and that the number and kind of atoms are the same in the reactants and products; 
• (D) classify energy changes that accompany chemical reactions such as those occurring in heat packs, cold packs, and glow sticks as exothermic or endothermic reactions; 
• (E) describe types of nuclear reactions such as fission and fusion and their roles in applications such as medicine and energy production; and 
• (F) research and describe the environmental and economic impact of the end-products of chemical reactions such as those that may result in acid rain, degradation of water and air quality, and ozone depletion.