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science 2 week 14

 The big question addressed in lab, and a description of what you did.

video notes 

- 2020- hottest decade ever, largest number of mega-fires, caused by lots of droughts

- fumes having impact on planet 

- fires are now occuring annualy since earth is warming and droughts are more common 

- sun is dominant source of energy 

- carbon dixode peeked then went down then went back up again

- plants takeup CO2 from atomospehere during summer, winter decomposition

- caused by veggitation in northern hemisphere 

- plant matter made up more of carbon 12 than carbon 13 

- carbon coming from volanos have different ratios 


Greenhouse effect 

- image in presentation 

Earths blenket and light 

- certain gases in our atmosphere act like a blanket around the earth 

- light rays coming from the sun contain visble photons (energetic light particles) 

- abosrbed by earths surface


A description of what you learned in Thursday's lecture.

Why do certain gasses cause the greenhouse affect? 


What are you most confused by that you want us to address on Monday? 


Carbon dioxide levels have changed over time, lots of carbon in beginigng of earth because there were no plants, 


how activte sun is, volancos, and what is in the greenhouse 

human impact is the only one that change because we see carbon 12, cutting down more plants instead of growing more 

measered on scale 1 - 0 

Albedo = 1 - reflects radiation 

albedo = 2 absorbs radiation 

Answer questions about the weekly textbook reading:

What did you learn?

I learned more about what greenhouse gas is and what effect it has. In the book it went into a more in depth explanation of the different types of gasses which are CO2, Nitrous Oxide, Methane, Water Vapor,  and Ozone. 

These gases are complex molecules made up of three or more atoms bonded togehter. Since gassses move quikcly and collie, it cuases greenhouse gas molectues to vibrate and have more of an asymetrical shape. They are able to absorb radtation from the sun. The radiation is then released back into the atmosphere which helps keep the planet warm to support life. 

The effect is how these gases in Earth's atmosphere trap heat. Since some of the radiation is reflected back into space, there is a higher albedo such as ice. Some other radation is absorbed by srufaces with low albedo like land and water. This is a KEY part in Earth's natural process, without heat from radation, Earth's temp would not be able to regualte. 

What was most helpful?

It was helpful that the book explained more about the albedo effect. I remember learning it in last section but it provided more description. 

Light srufaces = high albedo - reflect more energy 

dark surfaces = low albedo - absorb more energy 


What do you need more information on?

More information on the Carbon Cycle would be helpful. I mostly understand it, but I want to lean more about why it has an effect on global warming. 

What questions/concerns/comments do you have?

Does too much CO2 have a postive or negative effect on the environment? 


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