These objects are made up of mostly metals and rocy material. They tend to have circular orbits around the Sun, and they seem to want to group together in belts.

WSD

Explana

WSAWD

1) union forces launched a surprise attack.

2) more confederate troops arrived by train.

3) union forces retreated.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.