notes

 

 

 

• the atmosphere is how the earth is protected from harful rays and extreme tempatures.
• also the earth made the ozone layer that also help protect from harmfull rays.
• there are 5 layers of the atmosphere
• which are troposphere, stratosphere, mesosphere, thermosphere.
•  tropospher is the lowest layer
• weather happens in the tropospher
• most of the heat the is in the tropospher comes from the earth
• stratosphere is right above the tropospher
• air crafts fly in the stratospher
• ozone layer is in the stratosphere
• mesosphere is above the stratospher
• mesosphere is the coldest layer
• rocks and meteors burn up here
• thermosphere is the thickest layer
• exosphere is extremly thin
• outter layer where space shuttles orbits
• molecules are more densely pack at the surface
• our life depends on the ozone layer
  the ozone layer helps protect us from harm full rays and hot tempatuers
• either the sun energy is absorbed or reflected
• when the sun has energy it is more likely that anything that is dark in color will absorb the heat and anything that is light in color will reflect the energy back to space.

 

 

solar system presentation.

Big Crunch Theory

 

The big crunch theory is some what about the big bang theory only it has a twist. The big bang happens but while is going apart it ends up come back together. But I don't think that it happened because I don't see how it would come back together. Its said that the universe was shrinking but in todays time its getting bigger. So I don't see how it could happen if things how are getting bigger but in this theory its statement was that it was getting smaller.

 

 

The Big Bang Theory
 

 

The big bang is said that the universe happened because a small amount of matter expanded and exploded and ever since it has been expanding back then the universe is expanding still. When the big bang happened it was very hot. I think that this theory is better at explaining how the universe happened because that would explain why the universe expands.

 

 

The Ekpyrotic Theory

Hoyle said that the big bang theory never happened. He thinks that the earth has always looked the way it does now. That nothing has changed from then to now. He says that the big bang theory cannot be in scientific tearms meaning that it dont have a background of evidence saying that it happed. In the steady state theory they was saying that the density was always the same but with the big bang it was saying that it was always changing to a higher density.