A geologist is a person who studies the rocks and the earth's surface to find different phenomenon. The study of rocks and he fossils found there helps the geologist to understand and conclude the type of climate and the environment it formed the fossils of a place on earth. It provides large amount of information about the climatic conditions of the place when the layer of it was forming.
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers. Tiny organisms that live in the ocean are autotrophs. Some types of bacteria are autotrophs.
