About this Study Set
This study set covers Environmental Science through
25 practice questions.
A comprehensive quiz on core environmental science concepts covering ecology, atmospheric science, and sustainability. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 25 questions from the
Environmental Science Fundamentals study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which gas currently accounts for the highest percentage of Earth's atmosphere by volume?
-
A
Oxygen
-
B
Argon
-
C
Nitrogen
-
D
Carbon dioxide
2
What is the primary process by which nitrogen is converted into a form that plants can use?
-
A
Nitrogen fixation
-
B
Denitrification
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C
Photosynthesis
-
D
Transpiration
3
Which layer of the atmosphere contains the ozone layer that absorbs ultraviolet radiation?
-
A
Troposphere
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B
Stratosphere
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C
Mesosphere
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D
Thermosphere
4
What is the term for the maximum population size of a species that an environment can sustain indefinitely?
-
A
Biotic potential
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B
Carrying capacity
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C
Environmental resistance
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D
Growth rate
5
Which biome is characterized by low precipitation, extreme temperatures, and vegetation adapted to conserve water?
-
A
Tundra
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B
Taiga
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C
Desert
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D
Savanna
6
What is the primary cause of ocean acidification?
-
A
Increased solar radiation
-
B
Absorption of atmospheric carbon dioxide
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C
Plastic pollution
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D
Eutrophication
7
Which of the following is a non-renewable energy source?
-
A
Geothermal
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B
Biomass
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C
Natural gas
-
D
Wind
8
In an energy pyramid, approximately how much energy is transferred to the next trophic level?
9
Which phenomenon is responsible for the seasonal changes on Earth?
-
A
Distance from the sun
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B
Earth's axial tilt
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C
Ocean currents
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D
Volcanic activity
10
What is the main driver of the greenhouse effect?
-
A
Absorption of infrared radiation by gases
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B
Reflection of light by clouds
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C
Cooling of the Earth's crust
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D
Photosynthetic activity
11
Which process involves the breakdown of organic matter by decomposers in the absence of oxygen?
-
A
Aerobic respiration
-
B
Anaerobic decomposition
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C
Nitrogen cycling
-
D
Sedimentation
12
What is the primary source of phosphorus in the natural phosphorus cycle?
-
A
Atmospheric gas
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B
Weathering of rocks
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C
Biological nitrogen fixation
-
D
Volcanic eruptions
13
Which type of resource can be replenished by natural processes at a rate comparable to its rate of consumption?
-
A
Fossil fuel
-
B
Renewable resource
-
C
Non-renewable resource
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D
Inexhaustible mineral
14
What does the term 'biodiversity' primarily refer to?
-
A
The total mass of all organisms in an ecosystem
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B
The variety of life in a particular habitat or ecosystem
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C
The number of predators in a food chain
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D
The rate of extinction of species
15
Which soil horizon is primarily composed of organic matter, such as decaying leaves and twigs?
-
A
A horizon
-
B
B horizon
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C
C horizon
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D
O horizon
16
What is the main environmental impact of the over-application of synthetic fertilizers in agriculture?
-
A
Increased soil acidity
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B
Eutrophication of waterways
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C
Ozone depletion
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D
Desertification
17
Which gas is a significant byproduct of livestock agriculture and contributes to global warming?
-
A
Methane
-
B
Sulfur dioxide
-
C
Argon
-
D
Helium
18
What is a watershed?
-
A
A large artificial dam
-
B
An area of land where all water drains into a common outlet
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C
A type of desalination plant
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D
A deep underground aquifer
19
Which treaty was designed to phase out the production of substances that deplete the ozone layer?
-
A
Kyoto Protocol
-
B
Paris Agreement
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C
Montreal Protocol
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D
Basel Convention
20
What is the primary purpose of an Environmental Impact Assessment (EIA)?
-
A
To increase industrial output
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B
To predict and mitigate potential environmental damage from projects
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C
To promote international tourism
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D
To manage municipal waste collection
21
Which of these describes an r-selected species?
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A
Produces few offspring with high parental care
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B
Produces many offspring with low parental care
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C
Reaches sexual maturity at a late age
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D
Has a stable population near carrying capacity
22
What process converts solar energy into chemical energy in producers?
-
A
Respiration
-
B
Photosynthesis
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C
Fermentation
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D
Transpiration
23
Which of the following is a primary greenhouse gas produced by volcanic eruptions?
-
A
Oxygen
-
B
Carbon dioxide
-
C
Helium
-
D
Neon
24
What is the main cause of the loss of habitat for many species in the Amazon rainforest?
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A
Natural forest fires
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B
Deforestation for agriculture and logging
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C
Sea level rise
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D
Invasive species introduction
25
What instrument is used to measure the intensity of earthquakes?
-
A
Barometer
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B
Seismograph
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C
Anemometer
-
D
Hygrometer
