What is the acceleration due to gravity on the surface of the Earth?

What is the term for a sudden and violent shaking of the ground caused by the movement of tectonic plates?

What is the term for the process by which water returns to the Earth's surface from the atmosphere in the form of rain, snow, sleet, or hail?

What is the name for the process by which water from the surface of the Earth enters the atmosphere as water vapor?

What is the term for the process by which rocks are broken down into smaller particles through the action of wind, water, or ice?

What is the term for the process by which ice changes directly into water vapor without melting?

In the context of electricity, what does DC stand for?

What is the term for a cluster of stars bound together by gravity, with a spherical or irregular shape?

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

What is the name for the process by which rocks are dissolved by acidic water, particularly effective on limestone and other carbonate rocks?