Free Environment and Atmosphere MCQs with Answers
302 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.
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302 questions · page 31 of 31
301. Which among the following is the correct sequence of the various layers of the Atmosphere from the Earth's surface?
- A. Ionosphere, Mesosphere, Stratosphere, Troposphere
- B. Mesosphere, Stratosphere, Ionosphere, Troposphere
- C. Troposphere, Stratosphere, Mesosphere, Ionosphere
- D. Troposphere, Ionosphere, Stratosphere, Mesosphere
Explanation: The commonly taught order upward is troposphere, stratosphere, mesosphere and then the ionosphere region. The ionosphere is not a sharply separate layer because it overlaps mainly with the upper atmosphere, but option c gives the intended sequence.
Correct answer: Troposphere, Stratosphere, Mesosphere, Ionosphere302. The ozone layer is at height of________kilometers from the surface of the Earth?
- A. 10 to 20
- B. 20 to 30
- C. 30 to 40
- D. 40 to 50
Explanation: The ozone layer is concentrated mainly in the stratosphere, approximately 20 to 30 kilometres above Earth's surface. Ozone is most abundant around 15 to 35 kilometres, so this option is the standard approximate range.
Correct answer: 20 to 30