What is dendrochronology?
Dendrochronology is taking a tree sample of all the tree rings which can show environmental changes, hold old the tree is, dating events, and archaeological artifacts by using the tree patterns of annual growth.
How to take a tree core sample...
Step 1: Take a drill, place it at chest level.
Step 2: Apply pressure and drill/core the tree clock wise.
Step 3: Removing the core by drilling anti-clock wise.
Step 4: Pull out the core.
Step 5: Do samples and what ever you else you wish!
In the video above it shows How take a dendrochronology sample!
In the video bellow it explains why trees have rings!
As trees get taller there trunks get wider.
Seasonal climates make the tree vairy on how thick the tree rings are going to be.
When the growth rate slows down, commonly in the winter it produces darker right, and in better growing climates the rings are lighter. This is how we tell how old the tree it.
A tree doesn't always produce one ring a year due to the midseason drought it can show two rings and due to extreme cold climate it can show no rings because virtually no growth ocurse.
Trees in tropical area sometimes produce no dark rings due to the same climate. (Example Palm trees have no rings and cannot be dated).
Precipitation causes the tree rings to be fairly larger rather then when there is dry weather, because water makes trees grow!
If buildings or house are made of wood you can tell how old the house judging by the age of the wood.