The first organism on Earth was a bacterium, from what current science tells us. The Earth was composed of single-celled organisms in the beginning of the world.
The Moon!!
The first name of Earth is Terra, which is derived from Latin.
A satellite
It sure works on Earth. It works everywhere. If there is no net force on an object, the object will not accelerate. Vice versa, if the object does not accelerate, that means there is no net force on the object.
Gravity.
gravitational force
The "reaction" force.
Its a thing called 'The Moon'. It's been there for millions of years.
The technical name for the shape of the Earth is geoid. This is studied in the science of geodesy.
reaction.
applied force
It was the first artificial object to Orbit the Earth