thousands of years
12,000 = twelve thousands
139 thousands in decimal form is 139,000139 thousandths in decimal form is 0.139
19.0210 is 19 and 210 ten thousands in decimal form.
The standard form is 9,209,000
Amber forms over millions of years as tree resin hardens and fossilizes, a process that can take anywhere from tens of thousands to millions of years.
thousands of years
Yes
by erosion but it takes thousands of years to form.
Erosion, it happened probably over thousands of years
A sedimentary rock takes thousands to million of years to form because it is formed from lava (or magma). After thousands and millions of years, allowing the rock to cool, forms a rock shape, which we call a sedimentary rock. Please don't copy and paste this answer to present it as your own. Your Welcome!
Copper is a metallic element that can be encountered fairly often in its pure form. It is often found in nature as native copper, and has been used by humans for thousands of years due to its malleability and conductivity.
That's extremely variable and specific to each cave, but you have to think in tens or hundreds of thousands of years.
Gold can take millions of years to form in nature through geological processes involving heat and pressure.
It takes thousands of years to form because the rocks have to break down into little pieces.
Yes, gold was found thousands of years ago because it is often found in nature in its pure form as nuggets or grains, rather than combined with other elements. This made it easily visible and recognizable to ancient peoples as a valuable and desirable material.
Weathering breaks down rocks and minerals into smaller particles, which then mix with organic matter to form soil. This process can be physical (mechanical) or chemical in nature and occurs over thousands of years, contributing to the formation of fertile soil for plant growth.