Geologic History unit Review

Front

What is the relationship between CO2 levels and temperature?

Back

As CO2 increases, temperature also increases.

Front

What does it mean if 40% of Iodine-131 is left in a sample?

Back

The sample is approximately 11 days old.

Front

Which two geological layers are the same age?

Back

Bottom North and Middle West are the same age.

Front

What is the term for the new atom formed after radioactive decay?

Back

Daughter isotope.

Front

What is the half-life of Iodine-131?

Back

8 days.

Front

Define half-life in the context of radioactive decay.

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

Front

What is a parent isotope?

Back

The original radioactive isotope that undergoes decay.

Front

What is a daughter isotope?

Back

The isotope that is produced as a result of the decay of a parent isotope.

Front

How can scientists determine the age of a rock using radioactive dating?

Back

By measuring the ratio of parent to daughter isotopes.

Front

What does it mean if a graph shows a positive correlation between two variables?

Back

As one variable increases, the other variable also increases.