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Environmental Science Knowledge

Environmental Science

A collection of factual questions regarding wildlife biology, ecosystems, and environmental processes.

biology ecology nature

12 Questions Medium Ages 5+ Jul 20, 2026

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About this Study Set

This study set covers Environmental Science through 12 practice questions. A collection of factual questions regarding wildlife biology, ecosystems, and environmental processes. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 12 questions from the Environmental Science Knowledge study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which process do plants use to convert sunlight into chemical energy?

A Respiration
B Photosynthesis
C Transpiration
D Fermentation

2 What is the primary gas that makes up the Earth's atmosphere?

A Oxygen
B Carbon Dioxide
C Nitrogen
D Hydrogen

3 Which biome is characterized by low temperatures and a layer of permanently frozen subsoil?

A Tundra
B Taiga
C Savanna
D Chaparral

4 What is the term for the maximum population size of a species that an environment can sustain indefinitely?

A Growth rate
B Biotic potential
C Carrying capacity
D Niche overlap

5 Which animal group is considered the most diverse class of vertebrates on Earth?

A Mammals
B Birds
C Reptiles
D Fish

6 What is the main component of the shells of coral reefs?

A Calcium carbonate
B Silica
C Magnesium sulfate
D Sodium chloride

7 Which layer of the atmosphere contains the ozone layer that protects Earth from UV radiation?

A Troposphere
B Stratosphere
C Mesosphere
D Thermosphere

8 What type of organism breaks down dead organic material into simpler substances?

A Producer
B Consumer
C Decomposer
D Predator

9 Which gas is most commonly associated with the greenhouse effect caused by human activities like fossil fuel combustion?

A Nitrogen oxide
B Carbon dioxide
C Argon
D Helium

10 What is the process by which fertile land becomes desert, typically as a result of drought or deforestation?

A Desertification
B Eutrophication
C Salinization
D Bioaccumulation

11 Which marine mammal is a keystone species that helps keep kelp forests healthy by eating sea urchins?

A Dolphin
B Sea Otter
C Manatee
D Seal

12 What is the primary source of energy for almost all ecosystems on Earth?

A Geothermal heat
B Tidal movement
C Sunlight
D Wind

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