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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.
What else can I help you with?
Why have classification systems have changed over time?
Classification systems have changed over time because biologists have found better ways to organize the increasing organisms .
What are two ways in which the physical state of matter can be changed?
Two ways in which physical state of matter can be changed:- changing the temperature- changing the pressure
What are two ways an organisms joina population and two ways organisms leave a population?
Organisms can join a population through birth (natality) or immigration. Conversely, they can leave a population through death (mortality) or emigration.
What are the 3 different ways ground water reach the surface?
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.
Name two ways that a volcano can change the Earths surface quickly?
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.
What are two ways that rocks on the earths surface are changed?
1) physical erosion. 2) chemical weathering.
In what ways do glaciers change earth's surface?
They smooth earths surface
What are the advantages and disadvantages of the each ways of showing earths surface?
by turning them around.
The ways Which extrusive and intrusive igneous rocks are formed?
extrusive- when melted rock material coools on earths surface instursive-when the melt cools below earths surface
In what ways can people be affected by the forces that shape earths surface?
In all possible ways. We are a part of earth, so with that, a little part of it's surface too.
What are two ways glaciers erode Earths surface?
The glacier scrapes the surface of the earth as it advances, then deposits that till at its terminus when it melts.
List the 2 ways the earth's surface is changed?
iiddkk.haha we r not the smart peoples
Why have classification systems have changed over time?
Classification systems have changed over time because biologists have found better ways to organize the increasing organisms .
What are two ways that rocks on earth's surface are changed?
1) physical erosion. 2) chemical weathering.
Why do different areas on earths surface receive different amounts of solar radiation?
Because the Earth is tilted side ways.-YAMII ;)
How has the development of new technologies changed the ways we classify organisms?
It has mad them even smarter and have made them live.
What are two ways that scientists can study earths climates history?
What are two ways that's scientists can study earths climates history
