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.

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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.

281. Give name of the term SPM which is often used in the study of pollution.

اصطلاح ایس پی ایم کا نام بتائیں جو اکثر آلودگی کے مطالعہ میں استعمال ہوتا ہے۔

Check answer and explanation

Answer: Suspended Particulate Matter

Explanation Suspended particulate matter (SPM) SPM It is one of the essential particulate contaminants that transport heavy metals in the river syste m. Additionally, it is one of the phases of heavy metals in aquatic ecosystems

282. Which of the following is a way to reduce the Traffic noise on the highway?

مندرجہ ذیل میں سے کون سا طریقہ ہائی وے پر ٹریفک کے شور کو کم کرنے کا ہے؟

Check answer and explanation

Answer: Constructing the vertical barriers

Explanation · The path of traffic noise can be locked by constructing vertical barriers along the highways. · Proper highway planning and design are essential for controlling traffic noise. · Establishing lower speed limits for highways also reduced the noise.

283. The ozone layer protects the earth from rays sent by the sun?

اوزون کی تہہ زمین کو سورج کی کونسی شعاعوں سے بچاتی ہے۔

Check answer and explanation

Answer: Ultraviolet rays

Explanation The s tratospheric ozone layer is Earth's “ sunscreen ” protecting living things from too much ultraviolet radiation from the sun. Oxygen layer in the atmosphere Ozone protects us from the harmful ultraviolet radiation of the sun. Ozone formula : O3 The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere. The ozone layer is depleting : Air pollution ND17-7-2023

284. These destructive waves are caused by

یہ تباہ کن لہریں اس کی وجہ سے ہوتی ہیں

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Answer: Underwater earthquakes

Explanation Destructive waves, known as tsunamis Caused by underwater earthquakes . When an earthquake occurs beneath the ocean floor, it can displace a large volume of water Generating powerful waves that can travel across the ocean And cause devastation when they reach coastal areas

285. The energy emitted from the sun is supposed to be due to:

سورج سے خارج ہونے والی توانائی کی وجہ کیا ہے

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Answer: Nuclear fusion

Explanation The energy emitted by the sun is primarily due to nuclear fusion reactions in its core. Specifically, hydrogen atoms are fused into helium atoms, releasing a tremendous amount of energy in the process. This energy is then radiated o utwards as light and heat.

286. The study of the relationship between biotic and abiotic factors in environments is called?

ماحول میں حیاتیاتی اور ابیوٹک عوامل کے درمیان تعلق کا مطالعہ _____ کہلاتا ہے؟

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Answer: Ecology

Explanation Ecology is the scientific study of the relationships between living organisms (biotic factors) and their environment (abiotic factors). Including other organisms and their physical surroundings.

287. Hydrila is a common plant

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Answer: Hydrophyte

Explanation Hydrilla is a submersed, vascular hydrophyte

288. The hole in the ozone layer has been brought about by anthropogenic emissions of?

اوزون کی تہہ میں سوراخ انسانوں کی طرف سے خارج ہونے والی کن گیسوں کی وجہ سے پیدا ہوا؟

Check answer and explanation

Answer: CFCs

Explanation The ozone hole is mainly caused by chlorofluorocarbons (CFCs). CFCs release chlorine atoms that destroy ozone molecules. This happens in the Ozone Layer . Major impact observed over Antarctica . Linked to human activities like refrigeration and aerosols . Last verified on 02-05-2026

289. Area where river meet with sea is?

وہ علاقہ جہاں دریا سمندر سے ملتے ہیں؟

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Answer: Estuarine water

Explanation An estuary is the area where a river meets the sea, mixing freshwater with saltwater. Estuarine water is partially salty and supports diverse ecosystems.

290. The food chain always starts from ____?

کھانے کا سلسلہ ہمیشہ ____ سے شروع ہوتا ہے؟

Check answer and explanation

Answer: Producers

Explanation A food chain always begins with producers . It usually green plants or algae , that make their own food through photosynthesis . They provide the initial energy source for all other organisms ( consumers and decomposers ) in the food chain.

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