Friday, April 17, 2009

Tuesday, April 14, 2009

Monday, April 13, 2009

Rocks

Earth's crust began as molten rock. In the beginning all rock were igneous. Volcanoes deliver igneous rocks to the surface. Rock that forms underground is called intrusive rocks. Rocks that form from igneous rock fragments are called sedimentary rocks. Sand that is formed into rock is called sandstone. Layers of coal is formed from volcanic ash. Limestone is formed from skeletons of micro-organisms. Rocks that have been changed since they first formed are  called metamorphic rocks. Limestone turns into marble under a great amount of pressure. When metamorphic rock reaches the surface, it weathers and turns into sedimentary rocks.

Wednesday, April 1, 2009

Tuesday, March 31, 2009

Gases of the Atmosphere

The gases that make up the Earth and the percentages are, Nitrogen 78%, Oxygen 21%, Argon 0.9%, Carbon Dioxide 0.03%

Most of the earth's atmosphere is within 10 miles of the earth's surface

The air pressure at sea level is about 14.7 pounds per square inch
At 10,000 feet the pressure is about 10 pounds per square inch

The troposphere starts from about ground or water level up to about 11 miles high
The temperature generally decreases as altitude increases

The stratosphere is between 11 and 31 miles off the surface

The stratosphere increases in temperature as altitude increases

The earth's atmosphere was formed from planetary degassing, a process where gases are released from the earth's interior

Life forms modified Earth's atmosphere since their evolution

The atmosphere is mostly made of nitrogen

Nitrogen is important for the development and maintenance of life

Oxygen is second most in our atmosphere

Oxygen is good for keeping you and your brain alive and working

The third most in our atmosphere is Argon, it is good for non reactions

Carbon dioxide is the fourth most gas in the atmosphere, it is good for providing plants the ability to produce oxygen.

Other non gases are Neon, Helium, Krypton, and Hydrogen

Friday, March 27, 2009


1. The original atmosphere is similar to Jupiter's atmosphere.







2. The Troposphere is where all the weather happens at.






3. In the Stratosphere, air flows mostly horizontally.








4. The ozone layer is primarily for protecting the Earth from massive ultraviolet radiation. The ozone layer minimizes the amount of UV radiation that hits the earth.
























5. The ionosphere is where atoms are ionizing, or gaining or losing electrons.

Thursday, March 26, 2009

Earth's Atmosphere

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