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.
The correct answer Having a shoreline makes shipment by sea possible, which is less expensive than over land
North African and Middle Eastern countries can't join the EU since they're not from Europe, and regarding security, it's all the same now since it's not the middle ages any more.
Its primary purpose is to promote peace.
