Radioactive Decay

measuring the age of an event or object in years

• Radioactive measuring

• Absolute Dating

• Radiometric Dating

What is a isotope

• an atom the is decayed

• an atom with the same number of protons

• an atom that is half decayed and half not decayed

• an atom with a different number of neutron

When a radioactive isotopes break down into stable isotopes it's called....

• radio active atoms

• decaying

• radioactive decay

• absolute radioactive decay

Atoms of one element_______ into another element.

• break down

• decay

• build up

• kills and turns into

Method determining the ratio of________material to daughter material

• boyfriend

• son

• mother

• parent

the time it takes for half of the parent atoms to decay

• full day

• half life

• quarter life

• third life

Carbon 14-

• Lead

• Uranium

• Nitrogen 14

• Calcium

Carbon 14- Nitrogen: Used to date animals and plant, and has a half life of a 5,730 years

• True

• False

Uranium-Lead: used to date oldest rocks (more than 10 mill. years old)

• True

• False

The absolute age of a rock is the approximate number of years ago that the rock formed. The absolute age of an igneous rock can best be determined by...

• comparing the amounts of decayed and undecayed radioactive isotopes in the rock

• comparing the sizes of the crystals found in the upper and lower parts of the rock

• examining the rock's relative position in a rock outcrop

• examining the environment in which the rock is found