Question

Choose the correct option to complete the statements given.
The term “Blue Planet” indicates presence of
A) Land
B) Water
C) Oxygen
D) All of these

Answer 1

Hint: Land, water, living beings, and air are the four main subsystems that make up the Earth's structure. "Spheres" refers to all four subsystems. The "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air) are the four spheres. Beside this, the other important component is “Cryosphere” (ice).

Complete answer:
Blue Planet indicates presence of water because of the abundance of water on the earth, it is referred to as a blue planet. Water covers about 70% of the earth's crust. As a result, it takes on a blue color when seen from space.

During the forming of the earth, hydrogen molecules combined with oxygen molecules in a 2:1 ratio to form water, which remained liquid due to the earth's ideal temperature and sustained life on the planet. The blue colour of the Earth is from the vast bodies of water that occupy most of its surface.

Therefore, the correct answer is (Option B) i.e. Water.

Note: The Sea covers more than seventy percent of it. The Pacific Ocean alone occupies half of the Earth's surface. Life-giving gases such as oxygen can be found in the air. Because of the water bodies, it looks blue as seen from space. In terms of population, it is the fifth largest planet. It is somewhat flattened on the ends. The Earth's shape is known as a geoid.