PS1:B Chemical Reactions: No matter what reaction or change in properties occurs, the total weight of the substances does not change. (Boundary Statement: Mass and weight are not distinguished at this grade level.) When two or more different substances are mixed, a new substance with different properties may be formed.
Measure and graph quantities such as weight to address scientific and engineering questions and problems. (Using Mathematics and Computational Thinking) (Entrepreneurial: Critical thinking/Problem solving).