Biosphere and Earth's Domains

The video tutorial introduces the four domains of Earth: lithosphere, hydrosphere, atmosphere, and biosphere. It begins with a recap of the lithosphere, describing it as the solid outer layer of Earth, consisting of continents and land masses. The hydrosphere is then explained, covering all water bodies like oceans, seas, rivers, and lakes. The atmosphere is discussed next, highlighting its composition of gases and layers. Finally, the biosphere is introduced as the domain of life, where land, water, and air intersect, supporting various organisms from microbes to humans.

Which domain of the Earth is composed of rocks and soil and includes continents?

• Biosphere

• Atmosphere

• Lithosphere

• Hydrosphere

How many continents are there on Earth?

• Seven

• Eight

• Five

• Six

What is the hydrosphere primarily composed of?

• Water bodies

• Living organisms

• Air

• Land

Which of the following is a smaller body of water compared to an ocean?

• Pond

• Sea

• Lake

• River

What percentage of the atmosphere is made up of nitrogen?

• 21%

• 50%

• 1%

• 78%

Which layer of the atmosphere is closest to the Earth?

• Exosphere

• Stratosphere

• Mesosphere

• Troposphere

What does the term 'biosphere' refer to?

• The vast water bodies on Earth

• The solid outer layer of Earth

• The layer of air surrounding Earth

• The domain of life

In which domain do land, water, and air come into contact?

• Atmosphere

• Biosphere

• Lithosphere

• Hydrosphere

What are microbes?

• Tiny living organisms

• Large animals

• Non-living particles

• Types of plants

How many varieties of animals are there in the biosphere?

• 5 lakh

• 1 lakh

• 15 lakh

• 10 lakh