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प्रश्न
The Big Bang occurred ______ years ago.
विकल्प
13.7 billion
15 million
15 billion
20 million
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उत्तर
The Big Bang occurred 13.7 billion years ago.
APPEARS IN
संबंधित प्रश्न
Across
2. A dwarf planet
3. Equal days and nights
7. I am a gas found in the Sun
8. I appear once in 76 years.
Down
1. I am the morning star
2. India’s first moon mission.
4. I have two natural satellites.
5. I am the farthest planet.
6. An imaginary line passing through the centre of the Earth.
What do you know about Universe?
Write about the Planet Earth in detail.
Match the following
| Column A | Column B | |
| a) | Atavism | caudal vertebrae and vermiform appendix |
| b) | Vestigial organs | a forelimb of a cat and a bat’s wing |
| c) | Analogous organs | rudimentary tail and thick hair on the body |
| d) | Homologous organs | a wing of a bat and a wing of an insect |
| e) | Wood park | radiocarbon dating |
| f) | W.F. Libby | Thiruvakkarai |
The distance travelled by light in one year is called a ______.
All the atoms together only make up ______ percent of the universe.
All the matter in the universe is made up of hydrogen and helium.
The Milky Way is part of a small group of nearby galaxies called the:
Which galaxy is the nearest major galaxy to the Milky Way?
Scientists think the universe began in a huge explosion called the:
