Short & Long Questions: The Four Realms of the Earth | Footprints Class 6: Book Solutions, Notes & Worksheets PDF Download

Short Answer Questions

Q1: What are the three essential elements for life on Earth?
Ans: Water, air, and soil.

Q2: What is the biosphere?
Ans: The biosphere is the narrow zone of contact between the land, water, and air where living beings thrive.

Q3: Name the three realms or domains that make up the environment of Earth.
Ans: Lithosphere (land), Hydrosphere (water), Atmosphere (air).

Q4: Which ocean is the largest and has the Earth's deepest point?
Ans: The Pacific Ocean, with the Challenger Deep as the Earth's deepest point.

Q5: What is the primary gas in the Earth's atmosphere?
Ans: Nitrogen.

Long Answer Questions

Q1: Explain the components of the lithosphere and their significance.
Ans: The lithosphere includes the Earth's crust and the upper part of the mantle. It comprises continents (29%) and ocean beds (71%) and supports various physical features like mountains and plateaus. These features provide habitats for a variety of flora and fauna.

Q2: Describe the role of oceans in the hydrosphere and the significance of the hydrological cycle.
Ans: Oceans are a major part of the hydrosphere, covering more than 70% of the Earth's surface. The hydrological cycle involves processes like evaporation, condensation, precipitation, and helps maintain a continuous supply of fresh water on Earth.

Q3: Detail the layers of the Earth's atmosphere and their importance.
Ans: The atmosphere is divided into layers like troposphere, stratosphere, mesosphere, thermosphere/ionosphere, and exosphere. These layers play a crucial role in maintaining Earth's temperature, protecting from harmful rays, and supporting life. For example, the ozone layer in the stratosphere protects us from ultraviolet rays.

Q4: Explain the concept of the biosphere and its connection to ecosystems.
Ans: The biosphere is the zone where land, water, and air interact, creating habitats for various life forms. Ecosystems, consisting of both living and non-living elements, exist within the biosphere. These ecosystems form delicate networks of interrelationships among organisms and their environment.

Q5: Discuss the importance of maintaining ecological balance in nature.
Ans: Ecological balance is essential for the coexistence of living and non-living elements. Human activities can disrupt this balance, leading to environmental issues. It is crucial to understand the interconnectedness of the four realms (lithosphere, hydrosphere, atmosphere, and biosphere) and ensure responsible actions to preserve the Earth and its resources for future generations.