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

Q1: Multiple Choice Questions (MCQs)

(i) What are the three realms or domains that make up the environment of Earth?
(a) Fire, Water, Air
(b) Land, Sea, Sky
(c) Lithosphere, Hydrosphere, Atmosphere

(ii) Which continent is often referred to as the continent Down Under?
(a) Antarctica
(b) Australia
(c) South America

(iii) What is the primary gas in the Earth's atmosphere?
(a) Methane
(b) Nitrogen
(c) Oxygen

(iv) Which ocean is the smallest of the world's five oceans?
(a) Indian Ocean
(b) Arctic Ocean
(c) Southern Ocean

(v) What is the world's largest tropical rainforest, covering over 5.5 million sq km?
(a) Amazon Rainforest
(b) Congo Rainforest
(c) Australian Rainforest

Section 2: Fill in the Blanks

(i) The Earth's structure is compared to an __________.
(ii) The highest mountain on Earth is __________.
(iii) The atmosphere can be divided into layers based on certain characteristics of the air at different __________.
(iv) The Great Barrier Reef is located in __________.
(v) The biosphere is the zone where land, water, and air interact, creating __________.

Section 3: Match the Column (In a Table)

Match the continents with their unique features:
Worksheet: The Four Realms of the Earth | Footprints Class 6: Book Solutions, Notes & Worksheets

Q4: True or False

(i) The lithosphere comprises only continents.
(ii) The Pacific Ocean is the smallest ocean.
(iii) The Arctic Ocean remains frozen throughout the year.
(iv) The hydrosphere includes only oceans and seas.
(v) The thermosphere/ionosphere is where most weather phenomena are noticed.

You can access the solutions to this worksheet here.

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FAQs on Worksheet: The Four Realms of the Earth - Footprints Class 6: Book Solutions, Notes & Worksheets

1. What are the four realms of the Earth?
Ans. The four realms of the Earth are the lithosphere, hydrosphere, atmosphere, and biosphere. The lithosphere refers to the solid outer layer of the Earth, including the crust and upper mantle. The hydrosphere includes all the water on Earth, such as oceans, rivers, lakes, and groundwater. The atmosphere is the layer of gases surrounding the Earth, which is essential for supporting life and weather patterns. The biosphere encompasses all living organisms and their interactions with the other three realms.
2. How does the lithosphere affect the other realms?
Ans. The lithosphere, as the solid outer layer of the Earth, plays a significant role in influencing the other realms. It forms the foundation for the hydrosphere by providing the land masses on which bodies of water exist. The lithosphere also affects the atmosphere through processes like weathering and erosion, which release gases and particles into the air. Additionally, the lithosphere provides habitats for various organisms in the biosphere and influences their distribution and survival.
3. What are some examples of the hydrosphere in action?
Ans. The hydrosphere is constantly in action, with various processes and phenomena occurring. Examples include the water cycle, where water evaporates from the surface, forms clouds, and falls back to the Earth as precipitation. It also includes ocean currents, which play a crucial role in redistributing heat around the planet. Other examples include the formation of waves, tides, and the movement of water in rivers and lakes.
4. How does the atmosphere protect life on Earth?
Ans. The atmosphere provides a protective layer around the Earth, shielding it from harmful solar radiation and preventing extreme temperature fluctuations. It filters out most of the Sun's ultraviolet (UV) rays, which can be damaging to living organisms. The atmosphere also traps heat through the greenhouse effect, maintaining a relatively stable climate suitable for life. Furthermore, it contains oxygen and other gases necessary for respiration, allowing organisms to breathe and survive.
5. How do human activities impact the biosphere?
Ans. Human activities have a significant impact on the biosphere. Deforestation, for example, leads to habitat loss and threatens biodiversity. Pollution from industrial processes and the burning of fossil fuels can harm ecosystems and cause health problems in both humans and wildlife. Overfishing and unsustainable farming practices can deplete populations of certain species and disrupt food chains. Climate change, largely caused by human activities, poses a grave threat to the biosphere by altering habitats, triggering species extinction, and affecting natural processes.
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