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process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates

hydrothermal vents

hot water rises out of cracks in the ocean floor and is heated by the underlying magma

chemosynthetic archaebacteria

perform chemosynthesis on hydrogen sulfide coming out of hydrothermal vents

hydrogen sulfide

a highly toxic corrosive gas that smells like rotton eggs


organism that obtains energy from the foods it consumes; also called a consumer


plant-eating animal

primary consumer

An herbivore; an organism in the trophic level of an ecosystem that eats plants or algae


organism that obtains energy by eating animals

secondary consumer

consumer that eats primary consumers

tertiary consumer

consumer that eats secondary consumers

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