As the inner planets like Mercury, Venus and Mars and earth have a solid surface which is separated by the Sharpe atmosphere, and their gravity is too low to hold these light gases.

Uranus is primarily composed of gases and ice of which 83% is hydrogen and 15% helium and rest are trace gases. As in the early composition of the atmosphere, the inner planets like the earth had a solid atmosphere composed of solid silicates elements like magnesium, iron, calcium, and potassium.

As the earth has a highly unstable atmosphere only carbon, nitrogen and oxygen combined in lightning occur. And planet mercury has no atmosphere thus gravity is too low to hold any gas.

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2 years ago

In two or more complete sentences describe a procedure to increase the deposition of sediment at the mouth of a stream.

Ilya [14]

The deposition of sediment where there is a steep drop-off into shallow, flat land can create an alluvial fan. An alluvial fan is a triangular-shaped deposit of sand, gravel, and small sediments.

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2 years ago