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The verb form of hard is harden. As in "to harden something".
thousands of years
12,000 = twelve thousands
139 thousands in decimal form is 139,000139 thousandths in decimal form is 0.139
The standard form is 9,209,000
The verb form of hard is harden. As in "to harden something".
Typically thousands to hundreds of thousands of years.
The verb form of hard is harden. As in "to harden something".
thousands of years
thousands and thousands, there fossil fuels
Yes
by erosion but it takes thousands of years to form.
Coal takes millions of years to form from the pressure of dead plants and trees in swamps.
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!
first it becomes coal,after a thousands of years later,in extremely high pressure in side the earth,the heat changes it into kerosene or petrol.
No, some form quickly, some take thousands of years to form, some take millions of years to from.