Plants provide food for other organisms and help to shelter other organisms
The fact that volcanic rock has often been found early in the rock record but less frequently in later rock layers suggest to scientists the following conclusion about early earth: <span>volcanic activity was more common in the past than it is today.
</span>Besides volcanic activity in general, also huge volcanic eruptions<span> were much </span>more common than today<span>.</span>
Crust:outer silicate solid crust
mantle:highly viscous
core:solid inner core
