What is the term for the process by which a river wears away the land and carries sediment downstream?

What is the largest planet in our solar system?

In the periodic table, which period do the alkaline earth metals belong to?

What is the term for a type of galaxy that does not have a distinct shape, containing a mix of old and young stars?

Which layer of the Earth's atmosphere is characterized by the presence of the ionosphere and where auroras occur?

In the periodic table, which group do alkali metals belong to?

Which gas, abundant in the atmospheres of Uranus and Neptune, gives these planets their blue-green color?

Which hormone is responsible for the development of secondary sexual characteristics in males?

What is the name of the spacecraft that successfully landed the rover "Zhurong" on Mars, making China the second country to land and operate a rover on the Red Planet?

What is the process of a substance changing from a gas to a liquid called?