Presentation on theme: "C HAPTER 24 Section 1. B IOSPHERE I. Biosphere: Part of Earth that supports Life II. Biosphere includes: Top portion of Earths crust All the water that."— Presentation transcript:
C HAPTER 24 Section 1
B IOSPHERE I. Biosphere: Part of Earth that supports Life II. Biosphere includes: Top portion of Earths crust All the water that covers Earths surface Atmosphere that surrounds Earth III. What are some different environments on our biosphere? Desert Tropical Rain Forest
B IOSPHERE I. Earth is the 3 rd planet from the Sun II. The amount of energy that reaches Earth from the sun helps make the temperature just right for living here. III. Why cant we live on other planets? I. Mercury = Too hot during the day & too cold at night II. Venus = High temperatures & a thick carbon dioxide atmosphere III. Mars = Much colder than Earth & a thin atmosphere
E COSYSTEMS I. Ecosystem All of the organisms living in an area Includes the nonliving parts of the environment too II. Example: Bison, grass, birds, and insects are living organisms in a prairie ecosystem. Water, temperature, sunlight, soil, and air are the nonliving features. III. Ecology Study of interactions that occur among organisms and their environment.
P OPULATIONS I. Population: Made up of all the organisms of the same species that live in an area at the same time. All the bison in a prairie ecosystem All the grasshoppers in the prairie ecosystem make up another population II. Do we ever study how these different populations interact together? Yes!
P OPULATIONS I. Community: All the populations of all species living in an ecosystem II. Example: Prairie community is made of populations of bison, grasshoppers, cowbirds, and all other species in the prairie ecosystem. III. Arctic community: I. Populations of fish, seals that eat fish, and polar bears that hunt and eat seals.
H ABITAT I. Where does an organism live? I. Habitat I. Place in which an organism lives II. Example: A woodpeckers habitat is a tree III. Salamanders habitat is the forest floor beneath fallen leaves and twigs. They dont like sunlight – they prefer damp, dark places. I. This habitat provides the kinds of food and shelter, the temperature, and the amount of moisture the organism needs to survive.