biology

2. rock – Rock formed by layers of sediment (like sand, mud, or small rocks) that have been compressed over time.
3. – The process by which living things become fossils, preserving their remains in rock.
7. evolution – When two or more species that share a common ancestor become more different over time, usually because they adapt to different environments.
10. dating – A method of determining the exact age of rocks, fossils, or artifacts using techniques like radiometric dating.
11. – The study of where species live on Earth and how they got there.
12. – A group of similar organisms that can breed and produce fertile offspring.
13. – Layers of sedimentary rock, often used to study Earth's history and the age of fossils.
14. – The study of embryos and their development, often used to find evolutionary connections.
15. – The time it takes for half of a radioactive substance to decay.

1. morphology – The study of similarities and differences in the body structures of different organisms.
4. – A trait that helps an organism survive and reproduce in its environment.
5. – The process by which different species develop and change over long periods of time through natural selection and other mechanisms.
6. fossil – Evidence of an organism's activity, like footprints, burrows, or feces, rather than the organism itself.
8. – A branching diagram showing the evolutionary relationships between species based on shared traits.
9. – The evolutionary history and relationships among species or groups of species.
14. – A division of geological time that is shorter than a period and marked by significant events in Earth's history.