Answer:
Potassium-argon dating, method of determining the time of origin of rocks by measuring the ratio of radioactive argon to radioactive potassium in the rock. This dating method is based upon the decay of radioactive potassium-40 to radioactive argon-40 in minerals and rocks; potassium-40 also decays to calcium-40.
The answer is C. B is in America.
Answer:
puts geologic events in chronological order without requiring that a specific numerical age be assigned to each event.
Answer:
Nativists reacted badly to immigration, they were against it and wanted to limit the number of immigrants coming into the US. What were conditions like in the tenements? ... Conditions ere very poor in the tenements they were unhealthy and sometimes dangerous. How was education improved in the late 1800s?
Explanation: Hope that this helps you.
It was around the civil war time in the south when white people and black people were separated... also called segregation