Worksheet Solutions: 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
Ans: (c)
The three realms are lithosphere, hydrosphere, and atmosphere.

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

(iii) What is the primary gas in the Earth's atmosphere?
(a) Methane
(b) Nitrogen
(c) Oxygen
Ans: (b)
Nitrogen has the largest percentage in the Earth's atmosphere.

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

(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
Ans: (a)
The Amazon rainforest is the largest tropical rainforest.

Section 2: Fill in the Blanks

(i) The Earth's structure is compared to an __________.
Ans: onion

(ii) The highest mountain on Earth is __________.
Ans: Mount Everest

(iii) The atmosphere can be divided into layers based on certain characteristics of the air at different __________.
Ans: levels

(iv) The Great Barrier Reef is located in __________.
Ans: Australia

(v) The biosphere is the zone where land, water, and air interact, creating __________.
Ans: habitats

Section 3: Match the Column (In a Table)

Match the continents with their unique features:
Ans:

Q4: True or False

(i) The lithosphere comprises only continents.
Ans: False
The lithosphere comprises both continents and ocean beds.

(ii) The Pacific Ocean is the smallest ocean.
Ans: False
The Pacific Ocean is the largest ocean.

(iii) The Arctic Ocean remains frozen throughout the year.
Ans: False
During winters, the Arctic Ocean is frozen, but it melts and forms icebergs during summers.

(iv) The hydrosphere includes only oceans and seas.
Ans: False
The hydrosphere comprises oceans, seas, lakes, rivers, frozen water, and water vapor.

(v) The thermosphere/ionosphere is where most weather phenomena are noticed.
Ans: False
Most weather phenomena are noticed in the troposphere, not the thermosphere/ionosphere.