Prepare your students for success using this 5th Grade Science Test Prep Review and Practice Questions on all Chemistry Units. The NGSS CAST Test Prep Review and Questions covers the Chemistry Performance Expectations: 5-PS1-1. Develop a model to describe that matter is made of particles too small to be seen. 5-PS1-2. Measure and graph quantities to provide evidence that regardless of the type of change that occurs when heating, cooling, or mixing substances, the total weight of matter is conser