Is the prime meridian basically the equator?

Answer 1

Most certainly not.

The Prime Meridian is the line composed of all points on Earth whose longitude

is zero, and no place on it has any east or west. It goes halfway around the

Earth, between the north and south poles, its length is roughly 12,500 miles,

there is a point on it at every possible latitude, and the Equator makes a right

angle with it where they cross.

The equator is the line composed of all points on Earth whose latitude is zero,

and no place on it has any north or south. It goes all the way around the Earth,

its length is roughly 25,000 miles, every point on it is roughly 12,500 miles from

both poles, there is a point on it at every possible longitude, and the Prime

Meridian makes a right angle with it where they cross.

Other than that, yeah, they're basically the same thing.