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प्रश्न
How did the Earth form?
उत्तर
- Approximately 4.54 billion years ago, Solar System was a cloud of dust and gas known as Solar Nebula.
- Due to an explosion, these particles collapsed and began to spin having the sun at centre.
- The bigger particles which revolve around the sun are called planets. Thus the planet Earth formed.
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संबंधित प्रश्न
Short Answer Question:
What is meant by Terrestrial Life?
Short Answer Question:
Name the members of the Solar System.
Short Answer Question:
What is meant by Inner Planets? Name them.
Short Answer Question:
Distinguish the earth from the other planets in one important aspect.
Short Answer Question:
How did the earth get its atmospheric blanket?
Fill in the blank:
Eratosthenes worked out the circumference of the earth to be _______ km.
Fill in the blank:
A typical galaxy may contain ___________ stars.
How much time does a ray of moonlight take to reach the Earth?
How many planets are there in the Solar System?
Name the planets between the Sun and the earth.
Mention two important features of Earth that make it a planet suitable for life.
Name the following:
Two planets which are nearer to the sun than the Earth.
Find out the number of years to reach the following celestial bodies from the Earth: Nearest star from the Earth (Distance 150 million km)
Give reasons for the following:
Mercury completes its orbit in less time than the Earth.
Give reasons for the following:
Pluto is the coldest planet.
Give reasons for the following:
Comets appear very rarely.
Why is Neptune the coldest planet of the Solar System?
The biggest continent is ______________.
________ Percentage of our earth is covered by saltwater.
Match the following.
| 1 | Asia | Vatican city |
| 2 | Africa | Amazon rainforest |
| 3 | Europe | Sahara desert |
| 4 | South America | Kangaroo |
| 5 | Australia | Biggest continent |
