NEW
Font size
WorksheetsUnit 2: Biogeochemical Cycles Review
Total questions: 65
Worksheet time: 33mins
How is the nitrogen cycle important to humans?
It produces free nitrogen that humans can breathe.
It converts nitrogen into a form that humans can obtain by eating other organisms.
It produces nitrogen compounds that humans can breathe.
It converts nitrogen into a form that humans can obtain by absorbing it through their skin.
Which phrase best describes the biosphere?
the rocks on land and in the water
the plants on land and in the water
the animals in the air, on land, and in the water
the organisms in the air, on land, and in the water
Which interaction involves only one of Earth’s spheres?
Plant roots take in water from the soil.
Plants take in carbon dioxide from the air.
During photosynthesis, plants make food and release oxygen into the air.
Energy stored in plants is transferred to humans and animals that eat them.
Some bacteria live in the roots of plants like soybeans and peas. What is the role of these bacteria in the nitrogen cycle?
to absorb nitrogen-containing compounds from the soil
to release free nitrogen into the atmosphere
to break down nitrogen-containing compounds in dead organisms
to convert free nitrogen into usable nitrogen
Kate wrote the steps of the carbon cycle to describe how carbon is cycled through specific organisms. The steps are in random order. Which lists the steps in order?
2, 3, 1, 4
3,2,1,4
3,4,2,1
2,4,3,1
A rock collection comes from which part of Earth?
atmosphere
biosphere
geosphere
hydrosphere
The cryosphere is part of which sphere of the Earth system?
atmosphere
biosphere
geosphere
hydrosphere
When a volcano erupts, tiny particles from which of Earth’s spheres are released into the air?
atmosphere
biosphere
geosphere
hydrosphere
Which phrase describes one main feature of the atmosphere?
protects Earth's surface
includes organisms in the air, on land, and in water
consists of rock, minerals, landforms, and Earth's interior
comprises oceans, lakes, rivers, streams, and groundwater
Which phrase describes one main feature of the hydrosphere?
protects Earth's surface
includes organisms in the air, on land, and in water
consists of rock, minerals, landforms, and Earth's interior
comprises oceans, lakes, rivers, streams, and groundwater
Which phrase describes one main feature of the geosphere?
protects Earth's surface
includes organisms in the air, on land, and in water
consists of rock, minerals, landforms, and Earth's interior
comprises oceans, lakes, rivers, streams, and groundwater
Which phrase describes one main feature of the biosphere?
protects Earth's surface
includes organisms in the air, on land, and in water
consists of rock, minerals, landforms, and Earth's interior
comprises oceans, lakes, rivers, streams, and groundwater
Which statement describes an interaction between the biosphere and the hydrosphere?
Plants take in water through their roots.
Plants take in carbon dioxide from the air.
Energy stored in plants is transferred to humans and animals that eat them.
Plants make food through photosynthesis and release oxygen into the atmosphere.
Humans’ use of rocks and minerals as building materials is an example of which interaction?
an interaction within the geosphere
an interaction within the hydrosphere
an interaction between the biosphere and the geosphere
an interaction between the biosphere and the atmosphere
When a volcano erupts, particles of rock and ash are released into the atmosphere. After this, water droplets form around the rock and ash particles and fall to Earth as rain. The rainwater helps plants grow.
biosphere, cryosphere, hemisphere
cryosphere, geosphere, biosphere
geosphere, hydrosphere, biosphere
hydrosphere, cryosphere, geosphere
Which scenario describes an interaction between TWO of Earth’s spheres?
Water flows from a stream to a lake.
Gravity moves rocks to another location.
Lions use energy to catch other animals for food.
Bears dig big holes in the ground to protect their young.
Cars are powered by fossil fuels, which come from the remains of ancient living things that were buried and exposed to high temperature and pressure from Earth’s interior. Which spheres are represented when fossil fuels form?
atmosphere and biosphere
biosphere and geosphere
cryosphere and atmosphere
geosphere and hydrosphere
Seaweed belongs to which of Earth’s spheres?
atmosphere
biosphere
geosphere
hydrosphere
Which best explains why a thick tropical forest filled with large plants typically has a lot of water vapor in the air?
The plants undergo transpiration.
The plants undergo condensation.
The plants prevent water from evaporating.
The plants prevent water from becoming runoff.
Which organisms release carbon dioxide as waste?
consumers only
consumers and decomposers
producers and decomposers
producers only
Which best describes a role of animals in the water cycle?
They help water vapor condense when they produce waste.
They help water vapor condense when they inhale.
They release water vapor through transpiration.
They release water vapor when they exhale.
Which best compares the roles of nitrogen-fixing bacteria and certain decomposers in the nitrogen cycle?
Both organisms convert free nitrogen into nitrogen-containing compounds.
Both organisms convert nitrogen-containing compounds into free nitrogen.
The bacteria convert free nitrogen into nitrogen-containing compounds, while the decomposers convert nitrogen-containing compounds into free nitrogen.
The bacteria convert nitrogen-containing compounds into free nitrogen, while the decomposers convert free nitrogen into nitrogen-containing compounds.
Cleo has a vegetable garden and wants to increase the amount of nitrogen in the soil. How can she most likely do this?
add several soybean plants to her garden
decrease the amount of fertilizers she uses
harvest the vegetable plants continuously
reduce the number of decomposers that live in the soil
How is the nitrogen cycle important to humans?
It produces free nitrogen that humans can breathe.
It converts nitrogen into a form that humans can obtain by eating other organisms.
It produces nitrogen compounds that humans can breathe.
It converts nitrogen into a form that humans can obtain by absorbing it through their skin.
Which human activity would most likely decrease the amount of carbon in the atmosphere?
clearing forests
heating coal
heating coal
planting trees
What change of state occurs during the process of condensation?
gas changes to liquid
liquid changes to gas
gas changes to solid
solid changes to liquid
Which best describes transpiration?
run off from steep hills
icy precipitation
evaporation of water from leaves
water soaking into the ground
What occurs during infiltration?
water freezes and changes from a solid to a gas
fertilizers and debris run off into the bodies of water
water soaks into the ground
water evaporates from leaves
What change of state occurs during the process of evaporation?
gas changes to liquid
liquid changes to gas
gas changes to solid
solid changes to liquid
What is the source of energy that powers the water cycle?
precipitation
Sun
plants
heat from Earth's core
What is water that has infiltrated and collected underground called?
run off
precipitation
condensation
groundwater
What occurs to the water that does not infiltrate the ground?
It runs off into the nearest body of water.
It condenses into water vapor.
It is immediately transpired by plants.
It evaporates immediately into the atmosphere.
What type of organism can fix nitrogen?
animal
plant
bacteria
fungus
What non-living thing can fix nitrogen?
lightning
soil
water
sunlight
What is the most common way that nitrogen fixation occurs?
lightning
combustion
nitrogen fixing bacteria
denitrification
What is the name of the process that occurs when certain bacteria obtain energy by converting nitrates into nitrogen gas?
denitrification
nitrogen fixation
respiration
decomposition
How do animals obtain nitrogen?
respiration
photosynthesis
consuming plants
decomposition
How do animals contribute nitrogen to the nitrogen cycle?
decompostion
respiration
comsumption
photosynthesis
What type of plants contain nitrogen-fixing bacteria on their root nodules?
grasses
trees
legumes
corn
What process converts waste and decaying organic matter into ammonia?
denitrification
decompostion
fixation
respiration
What gas makes up 78% of Earth’s atmosphere?
oxygen
carbon dioxide
hydrogen
nitrogen
What chemical formula is used to represent nitrogen in our atmosphere?
N2
NH4
N2O
NO3
What important element are all living things made from?
carbon
oxygen
nitrogen
hydrogen
What carbon-rich molecules do plants create using carbon dioxide in the atmosphere?
proteins
fats
carbohydrates
amino acids
What biological process releases oxygen into the atmosphere?
cellular respiration
photosynthesis
decomposition
evaporation
What biological process releases carbon dioxide into the atmosphere?
cellular respiration
photosynthesis
decomposition
evaporation
Which organisms break down dead remains of plants and animals, and recycles carbon and nitrogen in the environment?
producers
consumers
herbivores
decomposers
Which biogeochemical cycle does lightning play a role in?
water cycle
carbon cycle
nitrogen cycle
precipitation cycle
Photosynthesis and cellular respiration are
processes involved in which
biogeochemical cycle?
water cycle
carbon cycle
nitrogen cycle
precipitation cycle
What is the most abundant form of nitrogen on Earth?
gas
liquid
solid
What is the process by which bacteria break down nitrates in the soil and send it back into the atmosphere as nitrogen gas?
denitrification
ammonification
assimilation
nitrogen fixation
What is the process of changing nitrogen into a form that can be used by living organisms?
denitrification
ammonification
assimilation
nitrogen fixation
What is the process in which decomposers break down waste or dead animals and return nitrogen to the soil in the form of ammonia?
denitrification
ammonification
assimilation
nitrogen fixation
What is the process in which living things use nitrogen to build proteins?
denitrification
ammonification
assimilation
nitrogen fixation
What is the process by which producers convert carbon dioxide into carbohydrates?
photosynthesis
consumption
decomposition
cellular respiration
combustion
What is the process by which carbon is released through burning?
photosynthesis
consumption
decomposition
cellular respiration
combustion
What is the process by which carbon dioxide is released when organisms die?
photosynthesis
consumption
decomposition
cellular respiration
combustion
What is the process by which living organisms release carbon dioxide into the air?
photosynthesis
consumption
decomposition
cellular respiration
combustion
What is the process by which carbon compounds are passed to herbivores when they feed on plants?
photosynthesis
consumption
decomposition
cellular respiration
combustion
What are the processes which add extra carbon to the atmosphere called?
sources
acidification
sequestration
reservoir
What are the places where an element such as carbon or nitrogen is stored called?
sources
acidification
sequestration
reservoir
Where does nitrification occur?
in the atmosphere
in the water
in the soil
in all of these places
Which organism is a nitrogen "fixer"?
goats
bacteria
fire flies
fish
How do people get nitrogen?
breathing it into their lungs
drinking water
eating meat and vegetables
absorbing it through their skin
What are the process of storing a large amount of carbon from the atmosphere?
sources
acidification
sequestration
reservoir
