by Cristian & Craig
this video talks about how if you cut a tree and count the rings you will know the age of a tree is and how much it grew that year. But some years if there a drout the tree mite grow two rings but if there a season of exteme cold it mite not grow a ring at all
tree growth lines
it show in the picture that every year it grows a little or a lot, sometimes never. it shows that trees can grow the same amount each year.as in the picture it shows the timeline and how the years and growths match up.