Sea Star: Dissection

Introduction: Echinoderms are radially symmetrical animals that are only found in the sea (there are none on land or in fresh water). Echinoderms mean “spiny skin” in Greek. Many, but not all, echinoderms have spiny skin. There are over 6,000 species. Echinoderms usually have five appendages (arms or rays), but there are some exceptions. Radial…

How Rocks Form: Igneous Rocks, Sedimentary Rocks, Metamorphic Rocks

Why study rocks? -Many, many uses! – writing tools (chalk, pencils), building materials (marble, concrete), fuels (coal), scouring powder (pumice, sand), weapons (flint, obsidian) Rock: a group of minerals bound together –          found in the Earth’s crust and mantle The Rock Cycle: the continuous process of rock formation and change – Presents a “map” of…

Principles of Ecology

Organisms and Their Environment What is Ecology? –Ecology: The scientific study of interactions among organisms and their environments *Ecology reveals relationships among living and nonliving parts of the world! Ex- what a coyote eats; -how day length influences the behavior of migrating birds; -how shrimp help rid ocean fishes of parasites; -how acid rain threatens…