How can you tell how old your dog is

Answer

look at its teeth- worn down teeth are older

look at its eyes- cloudy eyes is older

look at its fur- if it is white hair where there isnt supposed to be its older

see if its hearing is good- call his/her name

Explanation:

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).