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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.
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Name two ways that a volcano can change the Earths surface quickly?
makes new landforms creates mountains
What are the 3 different ways ground water reach the surface?
Ground water reaches the earths surface through; 1. Springs 2. Wells 3. Artesian basins
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 an organisms joina population and two ways organisms leave a population?
12456
How could evolution of aerobic respiration have permitted evolution of more complex organisms?
An oxygen-based metabolism provides more energy than an anaerobic metabolism, allowing for a larger volume-to-surface ratio of organisms. So organisms could grow larger, allowing their tissues to specialize in various ways, which means increasing complexity.
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 two ways the movement of earths plates changes the earths surface?
Its Tectonic Activity
What ways are resources brought up from under Earth's surface?
what are three ways resorce are brought up from under 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
How did earths atmosphere change?
Earths atmosphere has changed in a few ways. It contains more pollutants and carbon dioxide which is a greenhouse gas.
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.
Explain two ways that the movement of earths plates changes the surface of earth?
by rotation and also by erosition
Name two ways that a volcano can change the Earths surface quickly?
makes new landforms creates mountains
How earthquakes have changed the surface and atmosphere of the earth over millions of years?
EARTHQUAKES have changes the earth in many ways. The folding and faulting of the earth crust have left big cracks in the earths crust. The folding and faulting only happen on the tectonic boundaries. TECTONIC BOUNDARIES: The plates that make up the earths contents.
