Answer:
<u>Instead of Helium and Hydrogen there are heavier elements in inner planets like Nitrogen and oxygen.</u>
Explanation:
- 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.
When a stretch of coastline is formed from different types of rock, headlands and bays can form. ... When the softer rock is eroded inwards, the hard rock sticks out into the sea, forming a headland . Erosional features such as wave-cut platforms and cliffs can be found on headlands, since they are more open to the waves.
Answer
Hi,
The correct answer option is {A}
Explanation
River Yangtze of China has cities lined up along its banks.This means that waste water and other solid waste matter from the cities could be deposited into the river causing water pollution.The industries along the river might release warm water and untreated waste water including harmful chemicals into the river increasing the pollution.In such a case, aquatic life will be at risk and some rare species of fish could die and completely become extinct.
Hope this Helps!
True Neil Armstrong was the first man to land on the moon
