Many bacteria were protected from the ultraviolet radiation by the salt water in the ocean. In the sea bacteria made oxygen. Some of that oxygen escaped into the air and caused the earth surface to rust. After billions of years all the iron rusted in the sea and on the land. Then, when the oxygen was no longer used up in rusting iron, oxygen began to build in the atmosphere. The oxygen in the air blocked the deadly ultraviolet radiation from the sun, allowing life to evolve and migrate onto the land. Plants evolved and covered the earth and made it green.
Classification systems have changed over time because biologists have found better ways to organize the increasing organisms .
Two ways in which physical state of matter can be changed:- changing the temperature- changing the pressure
Organisms can join a population through birth (natality) or immigration. Conversely, they can leave a population through death (mortality) or emigration.
Groundwater can reach the surface through springs, where water flows naturally to the surface due to pressure or through seepage. It can also reach the surface through artesian wells, where pressure in an underground aquifer forces water to rise above the level of the aquifer. Lastly, groundwater can reach the surface through human-made structures like wells and boreholes.
Volcanoes can change the Earth's surface quickly by producing lava flows that can cover large areas in a short time, creating new landforms. They can also trigger landslides and lahars (mudflows) that rapidly reshape the landscape.
1) physical erosion. 2) chemical weathering.
They smooth earths surface
by turning them around.
extrusive- when melted rock material coools on earths surface instursive-when the melt cools below earths surface
In all possible ways. We are a part of earth, so with that, a little part of it's surface too.
The glacier scrapes the surface of the earth as it advances, then deposits that till at its terminus when it melts.
iiddkk.haha we r not the smart peoples
Classification systems have changed over time because biologists have found better ways to organize the increasing organisms .
1) physical erosion. 2) chemical weathering.
Because the Earth is tilted side ways.-YAMII ;)
It has mad them even smarter and have made them live.
What are two ways that's scientists can study earths climates history