Science-(Grade 7) Unit 1 Lesson 4: The History of Life on Earth: Summary & Quiz"Help your middle school science students explore fossils, extinction, and the geologic time scale with this engaging multiple-choice worksheet! This no-prep resource covers how paleontologists learn about ancient life, relative vs. absolute dating, the fossil record, extinction and mass extinctions, and the four major divisions of Earth’s history—Precambrian, Paleozoic, Mesozoic, and Cenozoic eras. Students will lear