Science sorry i put it in the wrong category View the chart below and answer the questions.

Geologic Time Scale

Time Period Duration (Millions of Years)

Cenozoic 66-0

Mesozoic 252-66

Paleozoic 541-252

The last members of the species Tyrannosaurus Rex lived approximately 68-66 million years ago. During which era did the last Tyrannosaurus live?

Trilobites appeared approximately 521 years ago and disappeared approximately 252 million years ago. During which era did the trilobites live?

According to the chart, what period are we in today?

Tyrannosaurus rex Mesozoic

Trilobites: Paleozoic

Us: Cenozoic

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.