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Questions and Answers
What celestial body is the Earth?
What celestial body is the Earth?
Which celestial body is the Moon?
Which celestial body is the Moon?
Which is the largest celestial body in the Solar System?
Which is the largest celestial body in the Solar System?
What determines the position of the North Star?
What determines the position of the North Star?
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How many Planets are there in the Solar System?
How many Planets are there in the Solar System?
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Though tremendous heat is emitted by the Sun, why do we receive only limited heat?
Though tremendous heat is emitted by the Sun, why do we receive only limited heat?
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The planet known as the Earth’s twin is ____
The planet known as the Earth’s twin is ____
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Which is the third nearest planet to the Sun?
Which is the third nearest planet to the Sun?
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All the Planets move around the Sun in a ____
All the Planets move around the Sun in a ____
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Asteroids are found in between the orbits of ____
Asteroids are found in between the orbits of ____
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What are the four major components, or realms, of the Earth?
What are the four major components, or realms, of the Earth?
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What is the Earth's natural satellite?
What is the Earth's natural satellite?
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What is the composition of the Earth's atmosphere?
What is the composition of the Earth's atmosphere?
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Where are man-made satellites launched into space from by the Indian Space Research Organization (ISRO)?
Where are man-made satellites launched into space from by the Indian Space Research Organization (ISRO)?
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What are small rocky objects that move around the Sun and are found between the orbits of Mars and Jupiter called?
What are small rocky objects that move around the Sun and are found between the orbits of Mars and Jupiter called?
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What do we observe in the sky at night time?
What do we observe in the sky at night time?
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Why can't we see the Moon and bright tiny objects during daytime?
Why can't we see the Moon and bright tiny objects during daytime?
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What are celestial bodies that emit their own heat and light called?
What are celestial bodies that emit their own heat and light called?
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Why do stars in the night sky appear tiny to us?
Why do stars in the night sky appear tiny to us?
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What are celestial bodies made up of gases and emit their own heat and light?
What are celestial bodies made up of gases and emit their own heat and light?
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Study Notes
- The Earth is the only natural satellite of our planet, and it is the third largest planet in the Solar System.
- The Earth is called the Blue planet since two-thirds of its surface is covered by water.
- The Earth has four major components, or realms: Lithosphere, Hydrosphere, Atmosphere, and Biosphere.
- The Lithosphere is the solid outer layer of the Earth, consisting of rocks and soils.
- The Hydrosphere includes all of the Earth's water bodies, such as oceans, seas, rivers, lakes, and ice caps.
- The Atmosphere is the layer of gas that surrounds the Earth and is made up of various gases, including nitrogen (78%) and oxygen (21%).
- The Biosphere is the realm of life and includes all living organisms on Earth, in the water, and in the air.
- The Moon is the only natural satellite of the Earth and is about one-quarter the size of the Earth.
- The Moon takes approximately 27 days to orbit the Earth and has mountains, plains, and depressions on its surface.
- Man-made satellites are artificial bodies designed to gather information about the universe and the Earth for communication.
- The Indian Space Research Organization (ISRO) launches satellites into space from its launching station at Sriharikota.
- Asteroids are small rocky objects that move around the Sun and are found between the orbits of Mars and Jupiter.
- Meteoroids are small pieces of rocky or metallic bodies that can drop upon the Earth and, upon entering the atmosphere, burn up and create a flash of light.
- Comets are celestial objects made up of a head and a tail. The head consists of solid particles held together by ice, and the tail is made of gases.
- A galaxy is a huge cluster of stars, and our Solar System is a part of the Milky Way or Galaxy.
- The Universe contains millions of galaxies.
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Description
Test your knowledge about the Earth's major components and the requirements for the growth and survival of animals and plants. Explore the significance of the Earth as a habitat for life.
