What molecular substance is believed to be the most basic requirement or signature for life to exist on the planet

the removal and transport of surface materials (soil, rocks, mud, etc.) through the actions of wind, water, and ice. (always involves movement of material)

to wear away or change the appearance or texture of (something) by long exposure

the hard layer of rock beneath looser rocks and soil.

to pass or change from a frozen to a liquid or semi liquid state

What is the correct order of the time periods in the Mesozoic Era, earliest to latest...

This is the first (and shortest) period of the Mesozoic era. It started with a mass extinction of over 90% of the Earth’s species.

During this time period, Pangea continues to break up even more and the ocean floods into new places. All this water gave the previously hot and dry climate a humid and drippy subtropical feel. Dinosaurs continued to diversify and grow huge

The continents now look much like they do today. Flowering plants appear and spread like crazy. The climate cools. Predators like Tyrannosaurus Rex and Spinosaurus dominate

in this Theory two scientists proposed the notion that a meteor the size of a mountain slammed into Earth 66 million years ago, filling the atmosphere with gas, dust, and debris that drastically altered the climate.

in this Theory it is believed that Ancient lava flows in India known caused the dinosaurs extinction

True Characteristics of a Dinosaur

Saurischia means

Ornithischia means

Apatosaurus and diplodocus are what kind of dinosaurs?

The two main divisions of Saurischian dinosaurs are Sauropoda and Theropoda

Sauropoda Dinosaurs were

Tyrannosaurus is a _________type of dinosaur

Living Birds are the living ancestors of ____________