Answer:
Potassium argon dating
Explanation:
Potassium argon dating is a method used in determining the origin of a rock. I is done by comparing the ratio of radioactive argon to radioactive potassium in the rock. This method is used to date rocks that are thousands of million years old.
the assumptions made when using the Potassium argon dating include :
- no argon was left after formation of the rock
- no argon has either entered or escaped the sample since it was formed.
Answer:
Area Studies or Regional Tradition of Geography.
Explanation:
Answer:
Below
Explanation:
The Constitution of 1917, still in force almost 100 years later, has 137 articles.
Answer:
The troposphere
Explanation:
It begins at the surface of the earth and extends out.