Has earth always had the same land masses and oceans that it has today? What will happen in the future, will they stay in the same places?

The look of the Earth has changed over time but continents have always been part of the picture. They didn't always look the way they do today, but yes, there have always been continents on Earth. Earth's continents are constantly in motion, and by running the tape ... against southern Europe, while the Atlantic will be a far wider ocean than it is today. ... During the war, Hess had used sonar to map some areas of the ocean floor in detail. ... away from both sides of the mid-ocean ridge at the same rate.

Nope.

Explanation:

Like I said in the last one, every single piece of land on the earth will continue to move.  It will forever be in movement.  I did so before humans were on the Earth, and it will do so for long after.

pure substance: iron,copper

impure substance: water,charcoal