Atmosphere MCQs - Everyday Science Practice | PakExamPoint

Practise Atmosphere MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.

Atmosphere MCQs and revision practice

Study Atmosphere through multiple-choice questions in Everyday Science. This subtopic contains 291 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.

Use these Atmosphere MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.

Continue your revision with related topics: 100 Most Repeated MCQs of EDS PDF MCQs, Alloy MCQs, Basics of Every Day Science EDS MCQs, Biology MCQs, Botany MCQs, Branch of Science MCQs, Cell MCQs, Chemistry MCQs.

Return to all Everyday Science topics to choose your next area of study. Read the MCQ study guide to plan your revision, or try a Everyday Science practice quiz.

Atmosphere: questions and answer review

Try each question before opening its answer. Record the concept behind each mistake and revisit it during your next practice session.

141. What is the name of layer which protect the earth from the sun?

زمین کو سورج کی نقصان دہ شعاعوں سے بچانے والی تہہ کا کیا نام ہے؟

Check answer and explanation

Answer: Ozone

Explanation The ozone layer is a part of the Earth’s stratosphere that absorbs most of the Sun’s harmful ultraviolet (UV) radiation. Without it, UV rays could cause skin cancer, cataracts, and environmental damage. It is found approximately 15–35 km above Earth’s surface. Last verified on 13-03-2026

142. Different seasons are formed because

مختلف موسم اس لیے بنتے ہیں۔

Check answer and explanation

Answer: Of revolution of the earth around the sun and on its orbit

Explanation The earth`s spin axis is tilted with respect to its orbital plane. This is what causes the seasons. ND12_8_2023

143. An ecosystem consists of _____?

ایک ماحولیاتی نظام _____ پر مشتمل ہے؟

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Answer: Biotic as well as abiotic components

Explanation Biotic Components: Living organisms (e.g., plants, animals, microbes). Abiotic Components: Non-living factors (e.g., sunlight, water, soil, temperature).

144. Meteorology is the science of _____?

میٹرولوجی کس کی سائنس ہے؟

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Answer: Weather and Climate

Explanation Meteorology is the scientific study of the atmosphere , especially weather and climate. It involves forecasting and understanding atmospheric phenomena.

145. Radio signals are reflected by which layer of the atmosphere?

ریڈیو سگنلز فضا کی کس تہہ سے منعکس ہوتے ہیں؟

Check answer and explanation

Answer: Ionosphere

Explanation Radio signals are reflected by the ionosphere It lies roughly 60 km to 1000 km above Earth. It reflects radio waves back to Earth It is very important for AM radio Last updated by NA on 28April 2026

146. Study of relationship of organisms to their environment is called?

جانداروں کے اپنے ماحول سے تعلق کا مطالعہ _____ کہلاتا ہے؟

Check answer and explanation

Answer: Ecology

Explanation The study of relationships between organisms and their environment is called Ecology . It helps understand how living things interact with each other and with their surroundings. Additional information : Embryology studies development of embryos. Ethology studies animal behavior. Entomology studies insects. Last verified on 16-01-2026

147. What is the primary/main component of natural gas?

قدرتی گیس کا بنیادی جزو کیا ہے؟

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Answer: Methane

Explanation The primary component of natural gas is methane (CH4). Making up 70% to 90% or more of its composition. It is a colorless, odorless, and highly flammable hydrocarbon gas. Characteristics: It is a fossil fuel, often found in rock formations alongside oil or on its own. Last updated question 15 March2026

148. Icy bodies around the Sun are:

Check answer and explanation

Answer: Comets

Explanation Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun. When a comet's orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets.

149. Which layer of the Earth is rigid?

زمین کی کون سی تہہ سخت ہوتی ہے؟

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Answer: Lithosphere

Explanation The lithosphere is the rigid outer layer of the Earth . It includes the crust and uppermost solid mantle. It is broken into tectonic plates . These plates move slowly over the softer layer below. Last verified on 02-05-2026

150. During global warming, the percentage of carbon dioxide has ______?

گلوبل وارمنگ کے دوران ، کاربن ڈائی آکسائیڈ کی فیصد ______ ہے؟

Check answer and explanation

Answer: Increased in atmosphere

Explanation Global warming is caused by rising CO₂ levels due to fossil fuel burning, deforestation, and industrial activities . Higher CO₂ concentration traps heat in the atmosphere, leading to climate change.

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