Filled with high interest exercises, this Grade 5 Unit 5workbook focuses on work and energy, heat energy, chemical energy, energy sources. Lifepac science curriculum brings the physical world of God's creation into focus. Students conduct experiments to reinforce scientific concepts, such as transformation of energy. Perfect for students who flourish in a self-paced, individualized learning format, each consumable Lifepac combines lessons, exercises, projects, reviews, and tests. Paperback.