Where on Earth’s surface do you think scientists can locate rocks from the Precambrian era? How do scientists determine the age

It can be utilized for creating molds or for decorative purposes.

Salinity measures the amount of dissolved minerals in seawater.

The outermost layer of Earth (apart from the atmosphere) is the crust, which consists of moving tectonic plates. When these plates grind and collide, they create folds and uplift that form mountain ranges, and they cause continents to shift position. These processes occur over millions of years.