Filled with high interest exercises, this Grade 4 Unit 7workbook focuses on causes of weather, forces of weather, observing weather, weather instruments. Lifepac science curriculum brings the physical world of God's creation into focus. Students conduct experiments to reinforce scientific concepts, such as weather. Perfect for students who flourish in a self-paced, individualized learning format, each consumable Lifepac combines lessons, exercises, projects, reviews, and tests. Paperback.