Teaches how body parts work together, how the brain receives messages from the other body parts, how bones support and protect, and how muscles move bones. Focuses on how weather affects our lives, including topics such as temperature, wind, heat, clouds, rain, snow, and storms. Teaches about oxygen and carbon dioxide, and their effects on plants, animals, and humans. Students identify salt water, places where icebergs and glaciers are found, and sources of air and water pollution. View TEKS.