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WorksheetsThe biogeochemical Cycles
Total questions: 20
Worksheet time: 20mins
Why do living things need nitrogen?
To get energy
To make amino acids
To make proteins
To make proteins AND amino acids
What cycle are fossil fuels part of ?
carbon
oxygen
nitrogen
phosphorus
What is the largest reservoir for nitrogen?
the ocean
rocks and minerals
the atmosphere
bacteria
The carbon in coal, oil, and natural gas came from
the combustion of fossil fuels
the remains of dead organisms
carbon-fixing bacteria in swamp soil
carbon dioxide dissolved in ocean water
Nitrogen fixation is the process in which certain bacteria convert nitrogen gas into
liquid nitrogen
nitrates
nitrites
ammonia
Plant roots directly obtain water from
Water vapor
Groundwater stored below the soil
Precipitation
Water runoff from rivers and streams
According to the diagram, geologic activity, such as volcanoes,
Increases the levels of CO2 in the atmosphere.
Decreases the levels of CO2 in the atmosphere.
This is a process where liquid water changes into water vapor
Evaporation
Precipitation
Transpiration
Condensation
This is a process in the nitrogen cycle in which ammonia is converted into nitrite and then to nitrate with the help of bacteria
Nitrogen Fixation
Nitrification
Ammonification
Denitrification
In the carbon-oxygen cycle, which of the following generates carbon dioxide and utilizes oxygen?
Producers
Consumers
Chemicals
Gases
Process by which animals obtain and digest nutrients by consuming plants or other animals.
Consumption
Excretion
Decomposition
Respiration
Process by which decomposers break down dead plants and animals and return the nutrients to the soil.
Respiration
Decomposition
Assimilation
Leaching
Process where plants take in CO2 from the atmosphere to make their own food.
Respiration
Combustion
Nitrification
Photosynthesis
