Chapter 4 Vocabulary Quiz

Total amount of living tissue within a given trophic level. 

• Biomass

• Nutrients

• Biotissue

• Phytoplankton

First producer of energy rich compounds that are later used by other organisms

• Consumer

• Secondary Consumer

• Primary Producer

• Trophic Level

If a plant lacked carbon dioxide, but had plentiful water and sunlight, the carbon dioxide would be considered a ______________.

• Trophic Level

• Nutrient

• Primary Producer

• Limiting Nutrient

An organism that must acquire its energy by consuming something else. Ex: Humans

• Nutrients

• Heterotrophs

• Autotrophs

• Primary Producers

Small floating algae that serve as the primary producer of many aquatic ecosystems.

• Primary Producer

• Grass

• Phytoplankton

• Biomass

Process used by autotrophs where sunlight is the source of energy for converting Carbon Dioxide and Water into Oxygen and Carbohydrates.

• Chemosynthesis

• Nitrogen Fixation

• Photosynthesis

• Biogeochemical Cycle

Organisms that absorb energy from a nonliving source and use it to make their own food source.

• Heterotrophs

• Autotrophs

• Primary Consumer

• Nutrients

Some bacteria perform ____________________, which is a process where Nitrogen gas is converted into Ammonia.

• Denitrification

• Nitrogen Fixation

• Chemosynthesis

• Photosynthesis

Organisms that rely on the presence of other organisms for their energy and nutrients.

• Autotrophs

• Producers

• Consumers

• Nutrients

Network of feeding interactions through which both energy and matter move, may contain multiple food chains.

• Biomass Pyramid

• Biogeochemical Cycle

• Food Chain

• Food Web