The root word climate refers to weather conditions over a long period. Climatic is based on the word climate. What does the suffix -ic in climatic mean? The Extinction of Dinosaurs We all know that at one time dinosaurs roamed the surface of Earth. But it’s been 65 million years since they died out. They thrived on the planet for many years, along with a vast number of other organisms and animals. How did the dinosaurs go extinct? Scientists formed many theories about what caused this obliteration. They included climate change, continental shifts, and volcanoes. Eventually, one theory began to suggest that the cause of the dinosaurs' extinction was the crash of an asteroid on Earth's surface. It was a huge asteroid (about 10 kilometers in width) that crashed against Earth. Its crash made a gigantic crater in Mexico. The crash caused total climatic shifts and changes in the temperature of the atmosphere. The crash also produced a great gas cloud around Earth that resulted in total darkness. It was this explosion that might have led to the complete extinction of the dinosaurs from the face of Earth.

A. made of something
B. something related to
C. person connected with
D. the state of being