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Bing Environment Quiz: 10 Questions With Answers
The natural environment includes all living and non-living things occurring naturally on Earth, from mountains and oceans to the atmosphere and weather. This quiz explores the composition, features, and challenges facing our planet's natural world.
Looking for Microsoft's own quiz? It is on your Microsoft Rewards dashboard. This page is our own practice quiz on the same topic, so you can learn the facts first. For the daily image quiz see today's Bing Homepage Quiz.
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Pick A, B or C for each question. The right answer turns green and a short fact explains it.
All 10 questions and answers
Every question with its answer and explanation. Open “Show answer” after you guess.
1 What term describes the four main components scientists use to understand Earth's natural systems?
- A The Four Layers
- B The Four Spheres
- C The Four Zones
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✓ Answer: B. The Four Spheres
Did you know? Earth science recognizes the lithosphere, hydrosphere, atmosphere, and biosphere as the four spheres corresponding to rocks, water, air, and life respectively.
2 Approximately what percentage of Earth's surface is covered by ocean?
- A 85%
- B 51%
- C 71%
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✓ Answer: C. 71%
Did you know? Oceans cover approximately 71% of Earth's surface, an area of some 362 million square kilometers, making them the dominant water feature on the planet.
3 What is the average salinity level of seawater?
- A 55 parts per thousand
- B 35 parts per thousand
- C 15 parts per thousand
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✓ Answer: B. 35 parts per thousand
Did you know? Average oceanic salinity is around 35 parts per thousand (ppt), though nearly all seawater has salinity in the range of 30 to 38 ppt.
4 Which ocean is the largest by area?
- A Atlantic Ocean
- B Indian Ocean
- C Pacific Ocean
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✓ Answer: C. Pacific Ocean
Did you know? The major oceanic divisions in descending order of size are the Pacific, Atlantic, Indian, Southern, and Arctic Oceans, making the Pacific the largest.
5 What type of water do rivers typically contain?
- A Freshwater
- B Saline water
- C Brackish water
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✓ Answer: A. Freshwater
Did you know? A river is a natural watercourse, usually freshwater, that flows toward an ocean, lake, sea, or another river as part of the hydrological cycle.
6 In Earth's atmosphere, what percentage is oxygen?
- A 21%
- B 78%
- C 35%
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✓ Answer: A. 21%
Did you know? Dry air is composed of 78% nitrogen, 21% oxygen, 1% argon, and inert gases plus carbon dioxide, with remaining gases referred to as trace gases.
7 Which atmospheric layer contains about 90% of Earth's ozone?
- A Stratosphere
- B Mesosphere
- C Troposphere
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✓ Answer: A. Stratosphere
Did you know? The ozone layer is contained within the stratosphere, mainly located in the lower portion from about 15-35 km altitude, where about 90% of atmospheric ozone is found.
8 What is the primary role of the ozone layer?
- A Creating weather
- B Reducing UV radiation
- C Trapping heat
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✓ Answer: B. Reducing UV radiation
Did you know? The ozone layer plays an important role in reducing the amount of ultraviolet (UV) radiation that reaches Earth's surface, protecting life since DNA is readily damaged by UV light.
9 Which greenhouse gas is most notably causing climate change through human activity?
- A Methane
- B Carbon dioxide
- C Nitrous oxide
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✓ Answer: B. Carbon dioxide
Did you know? Climate change and global warming are caused by anthropogenic releases of greenhouse gases, most notably carbon dioxide, which trap heat in Earth's atmosphere.
10 According to the Intergovernmental Panel on Climate Change, by how much will Earth warm between 1990 and 2100?
- A 0.5 to 2 degrees Fahrenheit
- B 15 to 20 degrees Fahrenheit
- C 2.7 to almost 11 degrees Fahrenheit
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✓ Answer: C. 2.7 to almost 11 degrees Fahrenheit
Did you know? The leading climate scientists concluded that the Earth will warm anywhere from 2.7 to almost 11 degrees Fahrenheit (1.5 to 6 degrees Celsius) between 1990 and 2100.
About Environment
Scientists recognize four main spheres that make up Earth: the lithosphere (rocks), hydrosphere (water), atmosphere (air), and biosphere (life). These interconnected systems work together to create the conditions that support all life on our planet and influence human survival and economic activity.
Questions and facts checked against the Wikipedia article Natural environment. How we write quizzes: editorial policy.
Environment Quiz FAQ
Is this the official Bing Environment Quiz?
No. BingQuiz.net is independent and not affiliated with Microsoft. This is our own free practice quiz on environment, written from the Wikipedia article linked on this page. Microsoft's quiz is on the Microsoft Rewards dashboard.
Where do I play the official quiz for Microsoft Rewards points?
Sign in to your Microsoft account and open the quiz card on the Microsoft Rewards dashboard (rewards.bing.com) or on Bing.com. Points are only credited there.
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No. Every quiz on BingQuiz.net is free and works without signing up.