Answer:
acid; there ph value is mostly 7
base: there ph value can be more than 7 or less than 7
I believe it is the very first one
hope it helps :)
Because the space is ultimate thermos.
Answer:
prime meridian
Explanation:
The meridian that runs through Greenwich, England, is internationally accepted as the line of 0 degrees longitude, or prime meridian. The antimeridian is halfway around the world, at 180 degrees. It is the basis for the International Date Line
national geographic
