Which one of the following figures represents the age of the earth ? Heat from the Sun evaporated lightweight elements like hydrogen and helium into interplanetary space. (c) Finally, the composition of the atmosphere was modified by the living world through the process of photosynthesis. (a) Loss of primordial atmosphere containing a thin layer of hydrogen and helium as a result of stripping off by solar winds. Jovian planets were Rocky planets are made mostly of rock and metal. And these planets are also nearer to the sun. That is why terrestrial planets are also called “Earth-like” planets, due to the similarity in the structure of the planet Earth. While the Jovian planets are giant balls of gas. Ltd. Download books and chapters from book store. The solar wind was most intense nearer the sun; so, it blew off lots of gas and dust from the terrestrial planets. Both Mars and Earth have permanent polar ice caps. Answer The terrestrial planets are rocky because: • The terrestrial planets were formed in the close vicinity of the parent star where it was too warm for gases to condense to solid particles. Terrestrial planets have surfaces that are rocky and may also have atmospheric gases. Which one of the following has the longest duration ? They are made of rocks and metals. These are similar to Earth in composition. Write an explanatory note on the ‘Big Bang Theory’. During the creation of the solar system, there were likely more terrestrial planetoids or very large asteroids, which probably merged … Inner or Terrestrial Planets: First four planets Mercury, Venus, Earth and Mars are much nearer to the Sim and have less number of satellites. A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. https://www.zigya.com/share/R0VFTjExMDAyMjY4. And these planets are also nearer to the sun. During the creation of the solar system, there were likely more terrestrial planetoids or very large asteroids, which probably merged or were destroyed. Terrestrial planets (also called telluric or rocky planets) are planets made up primarily of metals or silicate rocks which constitute most of Earth’s crust, asteroids, and rocky moons. Terrestrial planets are rocky because their composition is similar to the earth's composition.and rock and metal will be more in this zone.these have a hard surface.example:: Mercury, Venus,earth and mars are the terrestrial planets in our solar system. Jovian planets were formed at quite a distant location. The terrestrial planets were formed in the close vicinity of the parent star where it was too warm for gases to condense to solid particles. Larger terrestrial exoplanets (those at least twice as massive as Earth) are classified as super-Earths. In our solar system, Earth, Mars, Mercury and Venus are terrestrial, or rocky, planets. The terrestrial planets are rocky because they are earth-like and are made up of rocks and metals and have relatively high densities. Download books and chapters from book store. The outer planets Jupiter, Saturn, Uranus and Neptune are known as the "gas giants". They have a hot core surrounded by a layer of hot rock called the mantle. :����~x��!ј��ô� So some of the small rocky planets are actually the cores of bigger planets that have been stripped of their atmosphere. (ii)The heavier materials like nickel and iron sank towards the centre of the earth and the lighter ones moved towards the surface. Answer The terrestrial planets are rocky because: • The terrestrial planets were formed in the close vicinity of the parent star where it was too warm for gases to condense to solid particles. About 75% of Earth’s surface is covered in water. These are also called terrestrial planets because their structure is rocky similar to that of Earth. 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