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Environmental Science Explorer

Environmental Science

A collection of factual questions about our planet and its systems, designed for young learners.

environment science ecology sustainability

8 Questions Medium Ages 9+ Sep 1, 2026

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About this Study Set

This study set covers Environmental Science through 8 practice questions. A collection of factual questions about our planet and its systems, designed for young learners. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 8 questions from the Environmental Science Explorer study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which of these gases is the primary component of Earth's atmosphere, making up about 78%?

A Oxygen
B Carbon Dioxide
C Nitrogen
D Argon

2 What is the process by which plants use sunlight, water, and carbon dioxide to create their own food and release oxygen?

A Respiration
B Decomposition
C Photosynthesis
D Evaporation

3 Which layer of the Earth's atmosphere is closest to the ground, where most weather occurs?

A Stratosphere
B Mesosphere
C Thermosphere
D Troposphere

4 What term describes the variety of life in a particular habitat or ecosystem?

A Biodegradability
B Biomagnification
C Biodiversity
D Bioremediation

5 Which renewable energy source harnesses the power of moving water to generate electricity?

A Solar power
B Wind power
C Geothermal energy
D Hydropower

6 What is the name for the natural process where organic matter is broken down into simpler substances by microorganisms?

A Combustion
B Fermentation
C Decomposition
D Photosynthesis

7 Which part of a plant is responsible for absorbing water and nutrients from the soil?

A Stem
B Leaf
C Flower
D Root

8 What is the largest ocean on Earth, covering more than 30% of the planet's surface?

A Atlantic Ocean
B Indian Ocean
C Arctic Ocean
D Pacific Ocean

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