Rather than putting activity into a photo album they are stacked up in a box. If a scientist finds one of those fossils they can then assume the age of the rock based on the age of the fossil.
Where are the oldest pictures, by year, going to be in your stack? Often igneous intrusions will cut across activity of rock.
By comparing fossils of different primate species, scientists can examine how features changed and how primates evolved through time.
However, the age of each fossil primate needs to be determined so that fossils of the same age found in different parts of the world and fossils of different ages can be compared.
Understanding the ages of related fossil species helps scientists piece together the evolutionary history of a group of organisms.
For example, based on the primate fossil record, scientists know that living primates evolved from fossil primates and that this evolutionary history took tens of millions of years.The USGS has a good introduction of Datig Dating to have you practice putting historical events in the correct order. There are five different pictures of one repative sequence throughout time.Number the pictures from one to five with one being the oldest and five being the youngest.There are three general approaches that allow scientists to date geological materials and answer the question: "How old is this fossil?" First, the relative age of a fossil can be determined.Write the term that describes the event that happened in the space below the drawing. I spread a layer of jelly on another piece of bread.Want to share photos of you relativr your friends doing this activity? I spread a layer of peanut butter on a piece bread.As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils.A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.Just as when they were deposited, the strata are mostly horizontal (principle of original horizontality).The layers of rock at the base of the canyon were deposited first, and are thus older than the layers of rock exposed at the top (principle of superposition).