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.

11. A land where rainfall is lower than forest so it does not support growth of trees is called?

ایسی زمین جہاں بارش جنگل سے کم ہو اس لیے درختوں کی نشوونما میں معاون نہ ہو اسے کہتے ہیں؟

Check answer and explanation

Answer: Grassland

Explanation Grasslands, also known as prairies or savannas , are areas with lower rainfall than forests, typically between 50-200 mm annually. This lower rainfall doesn't support the growth of trees, but instead favors grasses and other herbaceous plants.

12. Warming in the earth's stratosphere is mainly caused by?

زمین کی اسٹریٹوسفیئر میں گرم ہونے کی بنیادی وجہ کیا ہے؟

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Answer: Absorption of solar radiation by ozone

Explanation The stratosphere is heated mainly by ozone . Ozone layer absorbs harmful ultraviolet (UV) radiation from the Sun. This absorption converts solar energy into heat. It causes warming in the stratosphere instead of cooling. This layer protects Earth from dangerous UV rays. Last verified on 01-05-2026

13. The chemical formula of ozone gas is ______?

اوزون گیس کا کیمیائی فارمولا ______ ہے؟

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Answer: O3

Explanation Ozone gas is a molecule made up of three oxygen atoms, with the chemical formula O3. This is different from ordinary oxygen, which has the chemical formula O2.

14. Some materials like cadmium, mercury, etc., are harmful to health. These materials are called _____?

کچھ مواد جیسے کیڈیمیم ، پارا ، وغیرہ صحت کے لئے نقصان دہ ہیں۔ ان مواد کو _____ کہا جاتا ہے؟

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Answer: Toxic

Explanation Materials like cadmium and mercury are harmful and can cause serious health issues, so they are called toxic substances. Toxic means poisonous or dangerous to living organisms.

15. The most abundant carbohydrate in nature is?

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Answer: Cellulose

Explanation The most abundant carbohydrate in nature is cellulose It is a structural polysaccharide that forms the cell walls of plants and is found in vast quantities throughout the plant kingdom.

16. In which layer of the atmosphere most clouds are formed?

زیادہ تر بادل فضا کی کس تہہ میں بنتے ہیں؟

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Answer: Troposphere

Explanation The troposphere is the lowest layer of Earth's atmosphere. Most of the mass of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all weather occurs within this layer. Major layers are troposphere stratosphere mesosphere thermosphere exosphere

17. In an ecosystem several food chains overlap form a network called ____?

ایک ماحولیاتی نظام میں کئی فوڈ چینز مل کر ایک نیٹ ورک بناتے ہیں جسے ____ کہا جاتا ہے؟

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Answer: Food Web

Explanation A food web is a network of multiple food chains that overlap and connect. It showing the complex feeding relationships between different species in an ecosystem. It's a web-like structure that illustrates the various pathways that energy and nutrients flow through the ecosystem.

18. In Space, an exploration Spectroscope is used for the following?

خلا میں، ایک ایکسپلوریشن سپیکٹروسکوپ کو درج ذیل کے لیے استعمال کیا جاتا ہے۔

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Answer: To study chemical composition of Stars

Explanation In space exploration , a spectroscope is typically used to analyze the light coming from stars, planets, and other celestial objects to determine their chemical composition. This helps scientists understand the formation and evolution of stars, planets, and galaxies.

19. The density of sea water is highest as

سمندر کے پانی کی کثافت کس سے زیادہ ہے۔

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Answer: Depth increase and salinity increase

Explanation Answer: B The density of sea water is highest as depth increase and salinity increase.

20. Power of radiations emitted by a star is called?

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Answer: Luminosity

Explanation Luminosity is the total amount of energy a star emits per second. It depends on the star’s size and temperature. Brightness is how bright the star appears from Earth, which can vary with distance. Magnitude is a scale t o measure stellar brightness.

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