COPPER ROCK VOLCANOES THOUSAND 3900

OLDEST METEORITES EVIDENCE IRON 1850

ERODED COMETS EARTH ATMOSPHERE METEORS

METAL PRESSURE

In the solar system there are many small fragments of __(1)_

and ice. Asteroids, __(2)__, and meteors are all smaller than planets or moons

___(3)___ bombard the earth and other moons and planets. The Earth’s ___(4)__ prevents most meteors from reaching the ground. But some bigger ones hit the surface. Rocks from space that reach the earths suface are called __(5)__

The earth has creaters such as Barringer Crater. It also has __(6)__

A hundred years ago, scientists argued about what made the crater. Bits of rock around the crater had a lot of __(7)__ in them. Meteorites have a lot of iron in them.

A volcano cant produce as much pressur as an impact. Some rock of the crater has been changed by very high__(8)__ This provides __(9)__ that suports the