Unit Six - Geologic Time - Absolute Dating

Question 1

What is Absolute Dating? (3)

Answer 1

1. Use of radioactive decay
2. Determine the exact age
3. Rock, fossil or event

Question 2

What is Radioactive Decay?

Answer 2

The disintegration of an isotope overtime.

Question 3

What are isotopes? (3)

Answer 3

1. Variations of an element
2. Same number of protons
3. Different number of neutrons.

Example

Stable Carbon has a mass of 12 units called Carbon - 12

Unstable Carbon has a mass of 14 units called Carbon - 14

Question 4

What is a Half - Life?

Answer 4

Time required for half of a radioactive product to decay into a stable product.

Question 5

THE HALF LIFE IS NEVER AFFECTED BY ENVIRONMENTAL CHANGES

Answer 5

SUCH A TEMPERATURE, PRESSURE, OR CHEMICAL CHANGES