Monday, April 13, 2009

The rock cycle.

1)Earth's crust began as molten rock.
2)In the beginning, all rocks were fire formed.
3)Volcanoes deliver igneous rocks to the surface.
4)Rocks that forms underground is called intrusive rocks.
5)Rock that forms from igneous rock fragments are called sedimentary rock.
6)Sand that is formed into rock is called sand stones.
7)Layers of coal are formed from living organisms.
8)Limestone is formed from sedimentary rock.
9)Rocks  that have been changed since they first formed are called metamorphic rock.
10)Limestone under great pressure turns to marvel.
11)When metamorphic rock reaches the surface, it weathers and becomes more sediments.

Wednesday, April 1, 2009

Tuesday, March 31, 2009

atmosphere

1)The earth's atmosphere is composed of 78% nitrogen, 21% oxygen, 0.9% argon and 0.03% carbon dioxide.
2)Most of the earth's atmosphere is within 10 miles of the surface of the earth.
3)At the sea level the air pressure is about 14.7 pounds per square inch.At the magnitude of 10,000 feet the air pressure is 10 pound per pound.
4)It goes from ground level up to 11 miles. The temperature decreases as the altitude increases.
5)The stratosphere is between 11 and 31 miles above the earth's surface.
6)The temperature increases as the magnitude decreases.
7)The earth's atmosphere was formed  by planetary degassing.(A process where gases were released from the interior of the interior of the earth.
8)Life forms on earth  had modified the composition of the atmosphere.
9)The atmosphere is mostly made up of nitrogen.
10)Nitrogen is important to life process.
11)Oxygen is the second most in our atmosphere.
12)oxygen is important because it helps you metabolized food into energy.
13)Argon is the other most gas is the atmosphere.
14)carbon dioxide is one of the last gases in the atmosphere and it helps humans to exhale from their lungs.
15)Neon,helium,krypton,and hydrogen are the other non gases that are in the atmosphere.

Friday, March 27, 2009

The atmosphere

1)The original atmosphere might be similar to the atmosphere in jupiter.                                    
 
3)The troposphere is where all the weather takes place, it is the 
region of rising and falling packets of air.




4) In the stratosphere is where air flow is most horizontal.

5)The ozone layer is particularly  a reactive form of oxygen.

6)The ozone molecules in the atmosphere had protected  life on earth from ultraviolet rays.
7)In the ionosphere aurora takes place and is also responsible for absorbing  the most energetic photons from the sun.

Thursday, March 26, 2009

Earth's atmosphere

1)Troposphere
2)Stratosphere 
3)Mesosphere
4)Thermosphere