Free Environment and Atmosphere MCQs with Answers
303 Environment and Atmosphere MCQs from Everyday Science, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Environmental science covers ecosystems, food chains and webs, energy flow, biogeochemical cycles, biodiversity, natural resources and population effects. Atmospheric study includes the layers and composition of air, weather and climate, greenhouse gases, global warming, ozone depletion, acid rain and pollution, with climate change distinguished from ordinary weather variation.
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303 questions · page 2 of 16
- A. Ionosphere
- B. Troposphere
- C. Mesosphere
- D. Stratosphere
- E. None of these
Explanation: Aurora Borealis occurs when charged particles from the Sun excite gases in the upper atmosphere, mainly the ionosphere and thermosphere.
Correct answer: Ionosphere- A. Infra-red
- B. Ultraviolet
- C. X-rays
- D. Gamma rays
- E. None of these
Explanation: Stratospheric ozone absorbs much of the Sun's harmful ultraviolet radiation, especially UV-B and UV-C.
Correct answer: Ultraviolet- A. Porous
- B. Hard
- C. Rough
- D. Brittle
- E. Volcanic
Explanation: Sedimentary rocks form from deposited particles that become compacted and cemented, leaving pores between grains in many cases.
Correct answer: Porous- A. Exosphere
- B. Ionosphere
- C. Troposphere
- D. Stratosphere
- E. Ozone layer
Explanation: The ionosphere contains charged particles that reflect or refract certain radio waves back toward Earth.
Correct answer: Ionosphere- A. Seasonal reversal of winds
- B. Revolution of earth
- C. Movement of clouds
- D. Rise in temperature
- E. Rain forests
Explanation: Monsoons result from seasonal differences in heating between land and sea, which reverse the prevailing wind direction.
Correct answer: Seasonal reversal of winds- A. Troposphere
- B. Ionosphere
- C. Mesosphere
- D. Stratosphere
- E. None of these
Explanation: The ionosphere contains charged particles that can reflect or refract certain radio waves back toward Earth, allowing signals to travel…
Correct answer: Ionosphere- A. Speed of sound
- B. Density of milk
- C. Humidity of air
- D. Specific gravity of liquids
- E. None of these
Explanation: A hygrometer measures the moisture content, or relative humidity, of air.
Correct answer: Humidity of air- A. Prevent global warming
- B. Filter out ultraviolet rays
- C. Absorb pollution
- D. All of the above
Explanation: Stratospheric ozone absorbs much of the Sun’s harmful ultraviolet radiation, especially UV-B and UV-C.
Correct answer: Filter out ultraviolet rays- A. the birth rate is high in developing countries
- B. the death rate is high in developing countries.
- C. much of the population has already reached the child bearing age.
- D. most of the world's population lives in industrialized countries.Trying Interactive Physics Simulation Software
Explanation: Population growth is greatest where birth rates remain high while death rates have fallen because of improved sanitation, medicine and…
Correct answer: the birth rate is high in developing countries- A. Kenya
- B. Malaysia
- C. Malta
- D. Pakistan
Explanation: The equator crosses Kenya in East Africa, as well as countries such as Ecuador, Brazil and Indonesia.
Correct answer: Kenya- A. take in Carbon Dioxide
- B. give off Oxygen
- C. give off Carbon Dioxide
- D. None of these
Explanation: Photosynthesis stops or greatly decreases in darkness, but respiration continues in plant cells.
Correct answer: give off Carbon Dioxide- A. Oxygen
- B. Cabon Dioxide
- C. Silicon
- D. Clay
Explanation: Oxygen forms about 46% of the Earth's crust by mass, making it the most abundant crustal element.
Correct answer: Oxygen- A. Sulfur Dioxide and Potassium Nitrate
- B. Sulfur and Charcoal
- C. Nitrogen Oxide and Potassium Nitrate
- D. Sulfur Dioxide and Nitrogen Oxide
Explanation: Sulfur dioxide and nitrogen oxides react with atmospheric moisture to form sulfuric and nitric acids, which fall as acid rain.
Correct answer: Sulfur Dioxide and Nitrogen Oxide- A. minor or no damage
- B. considerable damage
- C. severe damage
- D. extreme damage
Explanation: A wind speed of 10 to 13 kph is only a gentle breeze on the Beaufort scale, so it generally causes minor or no damage.
Correct answer: minor or no damage- A. 61%
- B. 67%
- C. 71%
- D. 76%Biological Sciences
Explanation: Water covers about 71% of Earth's surface, while land covers roughly 29%. Most of this water is in the oceans.
Correct answer: 71%- A. Aristotle
- B. Plato
- C. Einstein
- D. Newton
Explanation: Aristotle is commonly called the founder of meteorology because his work Meteorologica systematically discussed weather, winds, clouds and…
Correct answer: Aristotle- A. water
- B. salts
- C. minerals
- D. glucose
Explanation: The oxygen released during photosynthesis comes from the splitting of water molecules in the light-dependent reactions.
Correct answer: water- A. Anemometer
- B. Barometer
- C. Hydrometer
- D. Hygrometer
Explanation: An anemometer measures wind speed, often with rotating cups or blades. A barometer measures air pressure, while a hygrometer measures…
Correct answer: Anemometer- A. 0.039%
- B. 3.9%
- C. 13%
- D. 30%Chemistry
Explanation: Carbon dioxide makes up about 0.04% of the atmosphere by volume, historically often quoted as 0.039%.
Correct answer: 0.039%- A. Seasons
- B. Atmosphere
- C. Air and sounds
- D. Winds and clouds
Explanation: Meteorology is the scientific study of the atmosphere and its short-term phenomena, including weather, winds, clouds and precipitation.
Correct answer: Atmosphere