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WorksheetsBiogeochemical cycles
Total questions: 47
Worksheet time: 42mins
Nitrogen that is not combined with other elements and found in the atmosphere as gas is _____.
free nitrogen (N2)
nitrogen compounds
ammonia
nitrates (NO3-)
Why do living things need nitrogen?
To get energy
To make carbohydrates
To make nucleic acids
To make proteins AND amino acids
What process in plants takes in carbon dioxide from the atmosphere?
transpiration
photosynthesis
factory emission
Sunlight
Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert
nitrates intro nitrogen gas
ammonia into proteins
nitrogen gas into nitrates (NO3-)
proteins into nitrates
When nitrogen gas is turned in to a form that plants and animals can use, this is called
Combustion
Photosynthesis
Decomposition
Nitrogen Fixation
Carbon dioxide is added to the atmosphere by
Burning fossil fuels
Cellular respiration
An erupting Volcano
All answers are correct
In the Phosphorus cycle, how are plants getting the phosphorus they need.
By taking as the gas P2 from the atmosphere
From weathered rocks
From hawks eating fish
From the uplift of rocks
From the diagram of the nitrogen cycle shown. What are 2 ways that nitrogen can be fixed for plants to use?
By bacteria and deer
By lightning in the atmosphere and deer
By lightning in the atmosphere and bacteria in nodules of legumes
By rain and big "turdy" point bucks
During the water cycle, what is the term that is used for water moving over the surface of the land?
Infiltration
Percolation
Transpiration
evaporation
Run off
Using the picture provided, what is the name of bacteria that release nitrogen back into the atmosphere as a gas? (Hint -They wear black hats)
Black bacteria
nitrifying bacteria
denitrifying bacteria
Nitrification bacteria
During the water cycle, water moves from gases in the air to small droplets of water in clouds by the process of...
condensation
evaporation
transpiration
percolation
Phosphorus can also be found in aquatic biogeochemical cycles?
True
False
During the Carbon Dioxide/Oxygen cycle, what organisms release CO2 back into the atmosphere.
Goats, cats, dogs and plants
Plants only
Goats only
cats and dogs only
What is the most common way a farmer would acquire phosphate to put on his fields as a fertilizer.
Deer manure
dog manure
Mining
Water
During the Carbon/Oxygen cycle, what organism takes in Oxygen.
A mountain lion
A tree
grass
a shrub
A network of relationships that exchange energy, matter, or information is a ...
community
system
sphere
component of trial and error
As water moves into the soil to become ground water, this is known as
saturation
infiltration
transpiration
runoff
What is needed to break down the wastes and the dead bodies of organisms to release nitrogen and phosphorus to be used by plants.
large mechanical devices
rats and mice
decomposers
rocks from the rock cycle
What percentage of all the water on earth is freshwater?
97.5%
100%
.5%
2.5%
The Law of Conservation of Matter states that...
Matter is destroyed constantly
Matter is always being created
Matter change change from 1 form to another but cannot be created nor destroyed.
Where is the greatest or largest amount of phosphorus stored before it enters the phosphorus cycle?
In the Atmosphere
In manure
In the water
In rocks
Which of the following is the largest sink for carbon on earth.
Carbon in the oceans
carbon in sediments that become fossil fuels
Forests and plants
Tony Nef's janitorial sink
A reservoir that takes in more of a substance than what it releases is known as a ...
Storage unit
ground storage unit
sink
diaper
As much as we produce (as humans) we cannot account for all of the carbon. Somewhere it is being taken up, but we do not know where.
True
False
When Nitrogen or Phosphate move into water systems, it can lead to algal blooms called
green water
green pea soup
Ukky
Eutrophication
Atmospheric fixation of nitrogen is caused when thunder causes oxygen and nitrogen to chemically combine.
True
False
What percent of all the water on earth is ocean and salt lakes?
73%
97.5%
12%
20%
How does water get from the ocean's surface into the atmosphere? This is where we often begin the water cycle.
Condensation
Transpiration
Infiltration
Evaporation
True or False. Earth's environment consists of many systems interlinked and complex.
True
False
Matter that is required for life processes is known as ...
Decomposers
Nutrients
Consumers
Cellular Respiration
A _____ _______ is a relatively scarce naturally occurring element. Growth only occurs as long as it is available.
nitrogen bomb
phosphate bomb
limiting nutrient
impossible nutrient
______________ is an element found in cell membranes and ATP.
A Nitrogenous base
Phosphorus
Silicon
Sodium
______________ is an important element for life and it is also found in detergents used to clean clothing. It can lead to eutrophication if it gets in the water.
Sulfur
phosphorus
Carbon
Sodium
Legumes are plants that often contain _________ __________ bacteria in their roots.
carbon fixing
sodium fixing
nitrogen fixing
automobile fixing
Human technology has allowed us to fix Nitrogen from the atmosphere and use it for _______________, which allow us to improve the quality & quantity of plant growth.
photosynthesis
cellular respiration
weathering
fertilizers
How does much of the nitrogen and phosphorus from human use get into streams, ponds, and other water sources.
glaciation
run off
evaporation and precipitation
through ground water
On the pH scale, anything with a number below a 7 would be an ...
Base
Acid
Too low to measure
neutral compound
What would a solution with a pH of 7 be considered?
acid
base
neutral
unachievable
