kerogen

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

"The chemist studied the properties of the organic compound. "

"Example sentence: "To clean the paintbrushes, we need to use solvents that can dissolve the dried paint." "

"The teacher's smile was a significant of approval for my hard work. "

"The new math curriculum was a precursor to significant changes in the school's overall approach to learning. "

"The new student was a natural from Japan. "

"The box contained old photographs. "

"Scientists study plants to understand how they grow. "

"In the present, my focus is on finishing this project for work. "

"The mathematical transform used to convert the raw data into a frequency spectrum helped the engineers analyze the sound waves. "

"After many frustrating attempts, he eventually finished his school project. "

"The insoluble residue from the coffee grounds made cleaning the filter difficult. "