You are looking at a small organism under a microscope. It uses energy, grows, moves, reproduces, and responds to light.Which term best describes this organism?

A scientist wants to arrange major events like the appearance of plants and animals in order from oldest to newest.What tool should the scientist use?

While exploring a dry mountain area, you discover ancient marine fossils, like seashells, in the rocks.What does this prove?

You notice that deeper rock layers contain older fossils, while upper layers contain newer fossils.What does this help scientists do?