All Courses
Get the App Signup / Login
Sign in Open App
Class 6 Exam  >  Class 6 Tests  >  Test: Air Around Us - Class 6 MCQ

Test: Air Around Us - Class 6 MCQ


Test Description

16 Questions MCQ Test - Test: Air Around Us

Test: Air Around Us for Class 6 2024 is part of Class 6 preparation. The Test: Air Around Us questions and answers have been prepared according to the Class 6 exam syllabus.The Test: Air Around Us MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Air Around Us below.
Solutions of Test: Air Around Us questions in English are available as part of our course for Class 6 & Test: Air Around Us solutions in Hindi for Class 6 course. Download more important topics, notes, lectures and mock test series for Class 6 Exam by signing up for free. Attempt Test: Air Around Us | 16 questions in 10 minutes | Mock test for Class 6 preparation | Free important questions MCQ to study for Class 6 Exam | Download free PDF with solutions
Test: Air Around Us - Question 1
Save

What is the primary reason air is considered colorless and odorless?

Detailed Solution for Test: Air Around Us - Question 1
Air is colorless and odorless primarily due to its composition, which is mainly made up of nitrogen and oxygen. Nitrogen accounts for about 78% of the Earth's atmosphere, while oxygen makes up about 21%. These gases are transparent and do not have any inherent color or odor. This composition allows light to pass through without significant absorption or scattering, resulting in the colorless and odorless properties of air.
Test: Air Around Us - Question 2
Save

What is the approximate height of the Earth's atmosphere above the Earth's surface?

Detailed Solution for Test: Air Around Us - Question 2
The Earth's atmosphere extends to a height of about 600 kilometers above the Earth's surface. This vast layer of air plays a crucial role in protecting life on Earth by absorbing harmful ultraviolet radiation from the Sun, regulating the planet's temperature, and providing the necessary gases for respiration and other vital processes. The atmosphere is divided into different layers, each with distinct characteristics and functions that contribute to the overall balance of the Earth's climate and ecosystems.
1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Air Around Us - Question 3
Save

Which statement accurately describes the Earth's atmosphere?

Detailed Solution for Test: Air Around Us - Question 3
The Earth's atmosphere is a layer of gas that surrounds the planet, extending to an approximate height of 600 kilometers. This gaseous envelope plays a vital role in supporting life on Earth by providing the necessary gases for respiration, regulating temperature, and protecting against harmful radiation from the Sun. The atmosphere consists of a mixture of gases, with nitrogen and oxygen being the most abundant, along with traces of other gases such as carbon dioxide, argon, and water vapor.
Test: Air Around Us - Question 4
Save
How do we primarily perceive the presence of air when the wind blows?
Detailed Solution for Test: Air Around Us - Question 4
When the wind blows, we primarily perceive the presence of air through its movement. While air itself is invisible, we can feel and observe its effects when it moves objects or causes changes in the environment. The wind is essentially the movement of air masses from areas of high pressure to areas of low pressure, creating various weather patterns and influencing local climate conditions. Sensing the wind's movement is one way we can directly experience the presence and effects of air around us.
Test: Air Around Us - Question 5
Save
What process involves certain bacteria converting nitrogen and oxygen from the air into nitrates, which are essential for plants to make proteins?
Detailed Solution for Test: Air Around Us - Question 5
Nitrogen fixation is the process where specific bacteria convert nitrogen and oxygen from the air into nitrates, which are crucial for plants to synthesize proteins. This process plays a vital role in the nitrogen cycle, making atmospheric nitrogen available to plants in a form they can utilize for their growth and development.
Test: Air Around Us - Question 6
Save
Why does a lighted candle go out when covered with a glass tumbler?
Detailed Solution for Test: Air Around Us - Question 6
When a lighted candle is covered with a glass tumbler, it eventually goes out because the flame consumes the available oxygen inside the tumbler. Without oxygen, the combustion process cannot continue, leading to the extinguishing of the flame. This experiment demonstrates the essential role of oxygen in supporting combustion.
Test: Air Around Us - Question 7
Save
Which component of air is essential for the process of respiration in all living organisms, helping release energy from sugar?
Detailed Solution for Test: Air Around Us - Question 7
Oxygen is vital for the process of respiration in all living organisms. During respiration, oxygen is used to release energy from sugars through a series of metabolic reactions. This energy is essential for various cellular processes that sustain life. The absence of oxygen can lead to a halt in respiration and ultimately affect the survival of organisms.
Test: Air Around Us - Question 8
Save
How is oxygen continuously replenished in the atmosphere despite its utilization by living organisms?
Detailed Solution for Test: Air Around Us - Question 8
Oxygen in the atmosphere is constantly replenished due to the photosynthetic activities of plants and plant-like microorganisms. During photosynthesis, these organisms utilize carbon dioxide and water to produce oxygen as a byproduct. This crucial process helps maintain the balance of oxygen in the atmosphere, ensuring a continuous supply for living organisms to breathe.
Test: Air Around Us - Question 9
Save
What is the dominant gas in the Earth's atmosphere, making up approximately 78% of the air we breathe?
Detailed Solution for Test: Air Around Us - Question 9
Nitrogen is the most abundant gas in Earth's atmosphere, constituting about 78% of the air we breathe. Despite its abundance, plants and animals cannot directly utilize nitrogen. The process of nitrogen fixation by certain bacteria converts atmospheric nitrogen into forms that plants can absorb and utilize for their growth.
Test: Air Around Us - Question 10
Save
What role does water vapor play in the formation of weather conditions such as rain, snowfall, dew, and fog?
Detailed Solution for Test: Air Around Us - Question 10
Water vapor plays a significant role in the formation of various weather conditions. When water vapor in the air condenses, it forms clouds. Subsequently, these clouds can lead to precipitation in the form of rain or snowfall. Additionally, condensation of water vapor can result in the formation of dew and fog under specific atmospheric conditions, influencing local weather patterns.
Test: Air Around Us - Question 11
Save
How do plants contribute to the maintenance of atmospheric balance in terms of carbon dioxide levels?
Detailed Solution for Test: Air Around Us - Question 11
Plants play a crucial role in maintaining the balance of carbon dioxide levels in the atmosphere by absorbing carbon dioxide during photosynthesis. Through this process, plants utilize carbon dioxide to produce glucose and oxygen, releasing the latter back into the air. This symbiotic relationship between plants and the atmosphere helps regulate the concentration of carbon dioxide, supporting ecosystems and life on Earth.
Test: Air Around Us - Question 12
Save
What are the primary sources of carbon dioxide emissions into the atmosphere, contributing to the greenhouse effect and climate change?
Detailed Solution for Test: Air Around Us - Question 12
Industrial activities and transportation are significant sources of carbon dioxide emissions, leading to the accumulation of greenhouse gases in the atmosphere. The burning of fossil fuels in industries and vehicles releases carbon dioxide, contributing to the greenhouse effect and climate change. These anthropogenic activities have a substantial impact on Earth's climate system, emphasizing the need for sustainable practices to mitigate carbon emissions and reduce environmental impact.
Test: Air Around Us - Question 13
Save
How does air help regulate temperature on Earth?
Detailed Solution for Test: Air Around Us - Question 13
Air aids in regulating temperature by spreading the sun's heat all over the Earth. This process helps maintain an equilibrium in temperature across different regions, influencing weather patterns and supporting various ecosystems.
Test: Air Around Us - Question 14
Save
What is a significant benefit of the ozone layer in the atmosphere?
Detailed Solution for Test: Air Around Us - Question 14
The ozone layer plays a crucial role in absorbing harmful ultraviolet (UV) rays from the sun. This absorption protects living organisms on Earth from the damaging effects of excessive UV radiation, such as skin cancer and other health issues.
Test: Air Around Us - Question 15
Save
How is wind utilized as a source of energy in practical applications?
Detailed Solution for Test: Air Around Us - Question 15
Wind energy is harnessed through windmills, which utilize the kinetic energy of moving air to perform various tasks, such as generating electricity, pumping water, or grinding grain. This renewable energy source has gained popularity for its sustainability and environmental benefits.
Test: Air Around Us - Question 16
Save
In what way does air contribute to the dispersal of pollen grains and seeds?
Detailed Solution for Test: Air Around Us - Question 16
Air aids in the dispersal of pollen grains and seeds by carrying them through the wind. This mechanism enables plants to reproduce and spread their genetic material over varying distances, promoting biodiversity and ecosystem resilience.
Information about Test: Air Around Us Page
In this test you can find the Exam questions for Test: Air Around Us solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Air Around Us, EduRev gives you an ample number of Online tests for practice

Top Courses for Class 6

Download as PDF

Top Courses for Class 6

Important Questions for Air Around Us

Find all the important questions for Air Around Us at EduRev.Get fully prepared for Air Around Us with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Air Around Us syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Air Around Us resources.

Air Around Us MCQs with Answers

Prepare for the Air Around Us within the Class 6 exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Air Around Us

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Air Around Us with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup