Chapter Test: Environment - CTET & State TET MCQ

World Environment Day is celebrated globally on June 5th each year to promote environmental awareness and encourage actions for a sustainable and healthy environment, making option (d) the correct date.

Mountains, rivers, and trees are natural features formed by natural processes, making option (b) the correct choice as it solely represents elements created by nature.

The lithosphere is the outer solid part of the Earth consisting of rocks, minerals, and soil. Hence, option (b) correctly represents the components of the lithosphere.

The life-bearing layer on Earth is known as the biosphere. It encompasses all the areas on the planet where living organisms can exist and thrive. The biosphere includes various ecosystems, such as forests, oceans, grasslands, deserts, and even the atmosphere.

The lithosphere comprises the solid crust or the hard top layer of the earth, providing various landforms such as mountains, plateaus, plains, and valleys. It also provides land for agriculture, human settlements, forests, and grasslands.

The atmosphere is the layer of gases surrounding the Earth, and it provides oxygen for living organisms through the process of photosynthesis conducted by plants and other photosynthetic organisms.

The biosphere refers to the zone of life on Earth where living organisms, including plants and animals, exist. It encompasses all ecosystems and living organisms on Earth, making option (a) Biosphere the correct answer.

Growing plants is not inherently a threat to the environment; in fact, they contribute positively to the environment through oxygen production and carbon dioxide absorption. Therefore, option (b) Growing plants is the correct choice as it does not pose a threat to the environment.

Human beings interact significantly with the environment, altering it according to their needs through activities such as agriculture, construction, and resource extraction, making option (a) Human beings the correct choice.

Ecosystem: It is a system formed by the interaction of all living organisms with each other and with the physical and chemical factors of the environment in which they live, all linked by transfer of energy and material.