successions

"He is 67 in chronological age, but has the mind and body of someone 55."

"The geologists studied the rocks to learn about the history of the Earth. "

"That sedimentary is made of layers of sand and shells pressed together over time. "

"My teacher explained the new math concept, and I understood it perfectly. "

"The student's leadership in the class project helped the team succeed. "

"He documented each step of the process as he did it, which was good when the investigation occurred."

"Follow that car!"

"The teacher explained the lesson thoroughly throughout the entire class period. "

"The patriarch survived many descendants: five children, a dozen grandchildren, even a great grandchild."

"The transition from elementary school to middle school was difficult for many students. "

"The rock layers in the Grand Canyon provide a detailed geological record of the Earth's past. "

"The library has possession of the rare book, even though it doesn't own it. "