Our proven Spectrum Science grade 7 workbook features 176 pages of fundamentals in science learning. Developed to current national science standards, covering all aspects of seventh grade science education. This workbook for children ages 12 to 13 includes exercises that reinforce science skills across the different science areas. Science skills include: * Scientific tools * chemical vs. physical change * ecosystems * rock cycle * biotechnology * natural hazards * Science History. Our best-selling Spectrum Science series features age-appropriate workbooks for grade 3 to grade 8. Developed with the latest standards-based teaching methods that provide targeted practice in science fundamentals to ensure successful learning!