Questions & Answers
Browse all 20 questions from the
Middle School Environmental Science Quiz study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which layer of the atmosphere contains the ozone layer that protects Earth from ultraviolet radiation?
-
A
Troposphere
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B
Stratosphere
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C
Mesosphere
-
D
Thermosphere
2
What is the primary gas that makes up the majority of Earth's atmosphere?
-
A
Oxygen
-
B
Carbon dioxide
-
C
Nitrogen
-
D
Hydrogen
3
Which process do plants use to convert sunlight into chemical energy?
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A
Respiration
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B
Transpiration
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C
Decomposition
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D
Photosynthesis
4
What type of resource is coal, meaning it cannot be replaced once it is consumed?
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A
Renewable
-
B
Non-renewable
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C
Infinite
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D
Sustainable
5
Which term describes the variety of all living organisms on Earth?
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A
Ecosystem
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B
Biodiversity
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C
Habitat
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D
Population
6
What is the largest ocean on Earth?
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A
Atlantic Ocean
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B
Indian Ocean
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C
Arctic Ocean
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D
Pacific Ocean
7
Which of these is a major greenhouse gas released by human activities such as burning fossil fuels?
-
A
Argon
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B
Carbon dioxide
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C
Helium
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D
Neon
8
What is the role of decomposers in an ecosystem?
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A
To produce energy from sunlight
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B
To hunt primary consumers
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C
To break down dead organic matter
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D
To convert nitrogen into oxygen
9
Which of the following is considered a renewable energy source?
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A
Natural gas
-
B
Coal
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C
Solar power
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D
Petroleum
10
What is the process where water changes from a liquid to a gas or vapour?
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A
Condensation
-
B
Precipitation
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C
Evaporation
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D
Infiltration
11
Which biome is characterized by very low temperatures and a lack of trees?
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A
Tropical Rainforest
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B
Tundra
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C
Desert
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D
Grassland
12
What term refers to the total amount of greenhouse gases generated by our actions?
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A
Ecological footprint
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B
Carbon footprint
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C
Biomass
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D
Habitat loss
13
Which part of the Earth's environment consists of all living organisms?
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A
Lithosphere
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B
Atmosphere
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C
Hydrosphere
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D
Biosphere
14
What do we call the gradual increase in the average temperature of Earth's climate system?
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A
Global warming
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B
Weathering
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C
Erosion
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D
Tectonic shift
15
Which natural disaster is caused by the sudden shaking of the Earth's crust?
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A
Hurricane
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B
Tsunami
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C
Earthquake
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D
Volcano
16
What is the primary source of energy for the Earth's weather and climate?
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A
Geothermal heat
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B
The Sun
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C
Tidal energy
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D
Wind
17
Which layer of the Earth is located directly beneath the crust?
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A
Inner core
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B
Outer core
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C
Mantle
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D
Atmosphere
18
What is the main cause of the rise in sea levels globally?
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A
Increased rainfall
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B
Melting glaciers and ice sheets
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C
Reduced ocean salinity
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D
Increased ship traffic
19
Which cycle describes the continuous movement of water on, above, and below the surface of the Earth?
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A
Carbon cycle
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B
Nitrogen cycle
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C
Water cycle
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D
Rock cycle
20
What is the name of the process by which fertile land becomes desert, typically as a result of drought or deforestation?
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A
Reforestation
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B
Desertification
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C
Urbanization
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D
Conservation
