WorksheetsBiogeochemical Cycles (Nutrient Cycles)
Total questions: 18
Worksheet time: 9mins
What cycle are fossil fuels part of ?
carbon
oxygen
nitrogen
phosphorus
What is the largest reservoir for water?
the ocean
rocks and minerals
the atmosphere
glaciers
What is the largest reservoir for nitrogen?
the ocean
rocks and minerals
the atmosphere
bacteria
In an ecosystem, what happens to the atoms of certain chemical elements, such as carbon, oxygen, and nitrogen?
They move into and out of living systems.
They are only found in abiotic factors.
They move out of living systems and do not return.
They move into living systems and remain there.
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
The water cycle is driven by
water
wind
the sun
Earth's rotation
A place where matter/nutrients are collected/stored.
A lake
A reservoir
A cloud
The atmosphere
Law of conservation of mass states that
matter is neither created nor destroyed
matter is destroyed
matter is created
matter does not change
A mosquito with a mass of 2.5 grams dies and is decomposed. How much of its matter is either used by the decomposer or returned to the Earth?
10%
0%
100%
50%
