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.
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 ******
Explanation A lake starts freezing because of the cold atmosphere. It will first freeze At the top surface *** concept: when the water freezes to ice, the ice becomes significantly less dense than t he water and continues to float on the lake's surface. Below 4° Celsius, water becomes less dense as it gets colder, causing water to freeze to float to the top.
سبز مکانات بہت بڑے ڈھانچے ہیں ، جن میں زیادہ تر ______ بنائے جاتے ہیں؟
A. None of these
B. Glass
C. Wood
D. Steel
Check answer and explanation
Answer: Glass
Explanation Greenhouses are mainly made of glass to allow sunlight to enter and trap heat inside for plant growth . The glass panels create a warm, controlled environment ideal for cultivating plants year-round.
مچھر انسان کی جلد پر بیٹھ کر خون چوس رہا ہے کہ اس کی مثال _____ ہے؟
A. Decomposer
B. Host
C. Predator
D. Parasite (Parasitism)
Check answer and explanation
Answer: Parasite (Parasitism)
Explanation A parasite is an organism that feeds and lives in or on part of another organism (host), often causing harm to the host. In this case, the mosquito is feeding on the human's blood, making it a parasite.
ہوا مختلف گیسوں کا مرکب ہے۔ ہوا میں نائٹروجن کا کتنا حصہ ہے؟
A. 78%
B. 18%
C. 98%
D. 48%
Check answer and explanation
Answer: 78%
Explanation Nitrogen makes up about 78% of Earth's atmosphere, It is the most abundant gas . It is essential for plant growth as. It is a key component of proteins and DNA. Nitrogen is the chemical element with the symbol N and atomic number 7 . It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772 .
Explanation The North and South Poles are separated by the plane of the Equator This imaginary plane passes through the center of the Earth, dividing it into the Northern Hemisphere the Southern Hemisphere. Location: The equator is positioned at 0 degrees latitude, halfway between both poles . Last updated question by NA on 07 May 2026
Explanation The approximate height of Earth's atmosphere is 6,200 miles (10,000 kilometers). This is the approximate extent of the exosphere , the outermost layer of the atmosphere, which gradually merges with space.
Explanation In a direct relationship, one variable follows the same change when it comes to increasing and decreasing. For example, Ø when the pressure increases then the temperature also increases. Ø When the pressure decreases, then the temperature decreases.
درجہ حرارت کو منظم کرنے اور زمین پر آب و ہوا کا تعین کرنے میں سب سے اہم کردار کس کا ہے؟
A. Forests
B. Oceans
C. Mountains
D. Deserts
Check answer and explanation
Answer: Oceans
Explanation Oceans regulate Earth's temperature by absorbing, storing, and distributing heat through currents and evaporation . They play a crucial role in determining the global climate by influencing weather patterns and precipitation.
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