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Class 3 Exam  >  Class 3 Tests  >  Social Science Olympiad for Class 3  >  Test: Our Environment - 1 - Class 3 MCQ

Test: Our Environment - 1 - Class 3 MCQ


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10 Questions MCQ Test Social Science Olympiad for Class 3 - Test: Our Environment - 1

Test: Our Environment - 1 for Class 3 2024 is part of Social Science Olympiad for Class 3 preparation. The Test: Our Environment - 1 questions and answers have been prepared according to the Class 3 exam syllabus.The Test: Our Environment - 1 MCQs are made for Class 3 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Our Environment - 1 below.
Solutions of Test: Our Environment - 1 questions in English are available as part of our Social Science Olympiad for Class 3 for Class 3 & Test: Our Environment - 1 solutions in Hindi for Social Science Olympiad for Class 3 course. Download more important topics, notes, lectures and mock test series for Class 3 Exam by signing up for free. Attempt Test: Our Environment - 1 | 10 questions in 10 minutes | Mock test for Class 3 preparation | Free important questions MCQ to study Social Science Olympiad for Class 3 for Class 3 Exam | Download free PDF with solutions
Test: Our Environment - 1 - Question 1
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Global warming is the increasing of average global temperature due to an increase in what?

Detailed Solution for Test: Our Environment - 1 - Question 1
Global warming is primarily caused by the increase in greenhouse gases, such as carbon dioxide and methane, in the Earth's atmosphere. These gases trap heat from the sun, causing the planet's temperature to rise, which is known as the greenhouse effect.
Test: Our Environment - 1 - Question 2
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Fill in the blank. Zooplanktons feed on _______

Detailed Solution for Test: Our Environment - 1 - Question 2
Zooplanktons primarily feed on phytoplankton, which are microscopic photosynthetic organisms. This relationship is a key component of aquatic ecosystems, supporting a vast array of marine life.
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Test: Our Environment - 1 - Question 3
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In the given figure, there are four trophic levels. Among them, the level where decomposers fit is-

Detailed Solution for Test: Our Environment - 1 - Question 3

Decomposers play a crucial role in breaking down organic matter and are often placed in another separate trophic level of a food web. They recycle nutrients back into the ecosystem, making them available for use by primary producers.

Test: Our Environment - 1 - Question 4
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During photosynthesis, the percentage of solar radiation absorbed by green plants is-
Detailed Solution for Test: Our Environment - 1 - Question 4
Only a small percentage of solar radiation (about 1%) is absorbed by green plants during photosynthesis. This energy is used to convert carbon dioxide and water into glucose, a process that is fundamental to life on Earth.
Test: Our Environment - 1 - Question 5
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Which of the following are environment-friendly practices?
Detailed Solution for Test: Our Environment - 1 - Question 5
All the mentioned practices contribute to reducing environmental impact and promoting sustainability. Using cloth bags reduces plastic waste, walking cuts down on carbon emissions, and conserving electricity saves energy and reduces greenhouse gas emissions.
Test: Our Environment - 1 - Question 6
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The depletion of the Ozone shield is due to __________.
Detailed Solution for Test: Our Environment - 1 - Question 6
Chlorofluorocarbons (CFCs) released into the atmosphere contribute to the depletion of the ozone layer. These compounds break down ozone molecules, reducing the Earth's protection against harmful ultraviolet radiation.
Test: Our Environment - 1 - Question 7
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In an ecosystem, the different food levels are called
Detailed Solution for Test: Our Environment - 1 - Question 7
Trophic levels represent the position of organisms in a food chain or web, from primary producers to apex predators. Each level plays a critical role in the flow of energy through an ecosystem.
Test: Our Environment - 1 - Question 8
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Biodegradable wastes can be utilized to produce _____________.
Detailed Solution for Test: Our Environment - 1 - Question 8
Biodegradable wastes, like organic matter, can be used to produce biogas through a process called anaerobic digestion. This not only helps in managing waste but also provides a renewable source of energy.
Test: Our Environment - 1 - Question 9
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Identify what is happening in the image below.
Detailed Solution for Test: Our Environment - 1 - Question 9

The correct identification is a Forest Fire. Forest fires can be caused by natural factors such as lightning or human activities. They can lead to significant ecological damage but also play a role in the natural cycle of woodland regeneration.

Test: Our Environment - 1 - Question 10
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The solid waste collected from all our houses is thrown out of the city in a place called-
Detailed Solution for Test: Our Environment - 1 - Question 10
Landfills are designated areas where solid waste is disposed of, often buried under the soil. This method of waste management prevents contamination of water and air but requires careful management to avoid environmental harm.
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