Northwest pH Greenhouse Gases Upwelling Fossil Fuel pH A scientific scale measuring acidity and alkalinity. Greenhouse Gases Gases that trap heat in the Earth’s atmosphere. Upwelling A process in which deep, cold, nutrient-rich waters from the ocean rise to the surface. Fossil Fuel A fuel derived from the remains of ancient plants and animals. Northwest Zooplankton Food Web Sustainability Ecosystem Phytoplankton Zooplankton Animals in the ocean that drift with the currents. Food Web A map of the interconnected food relationships in a community. Sustainability Meeting the needs of the present without limiting the ability of people, other species and future generations to survive. Ecosystem A community of living things interacting in an environment. Phytoplankton Plants in the ocean that drift with the currents. Northwest Carbonic Acid Plankton Calcium Carbonate Ocean Acidification Biodiversity Carbonic Acid A weak acid that is formed from water and carbon dioxide. Plankton Organisms in the ocean that drift with the currents. Calcium Carbonate A chemical compound found in shells and bones. Ocean Acidification The change in ocean chemistry due to increased carbon dioxide in the atmosphere. Biodiversity The variety of living organisms in an environment. Northwest