Question

The earth crust is broken into a number of Hawk parts they are called

Answer 1

Answer:

tectonic plates

Explanation:

Answer 2

Answer:

PLATE TECTONICS

Explanation:

Plate tectonics—the worldwide face-lift that continually, but slowly, reshapes the surface of Earth—is apparently unique to our planet; at the very least, it occurs nowhere else in the solar system. This process is responsible for volcanoes, earthquakes, and mountain building, and possibly for helping harbor early life on Earth.  Yet there is much we still don’t know about what drives it and when it began. Now, a new study may help resolve one question: when and how Earth’s rigid outer shell, or lithosphere, first divided into plates and their global dance began.

Evidence of Earth’s earliest geologic history is scant, thanks to the constant recycling of our planet’s surface. But geologists do have a few clues. One line of evidence comes from hardy crystals called zircons, found primarily in granite—the formation of granite requires subduction, the sinking of a lithospheric slab into the mantle where it partially melts to produce so-called granitic magma. Based on the very existence of ancient zircons, some geologists surmise that subduction occurred, at least intermittently, sometime around 4 billion years ago. Other evidence to bolster this claim includes rock sequences from the deepest point on Earth, the Mariana Trench in the Pacific Ocean. The trench, formed where the Pacific Plate is sinking into the mantle, contains 4.4-billion-year-old lavas that may have resulted from the earliest subduction zone on Earth.