Science
We begin section 2.8 today and will assign the element super hero project - due November 24.
2.8 - Atmosphere p. 60-61
Notes for 2.8
The atmosphere is a mixture of nitrogen (78%), oxygen (21%), and other gases (1%). High above the planet, the atmosphere becomes thinner until it gradually reaches space. It is divided into five layers. Most of the weather and clouds are found in the first layer.
Over the past century, greenhouse gases and other air pollutants released into the atmosphere caused global warming, ozone holes, and acid rain.
Nitrogen (N2) makes up most of our Atmosphere. It reacts with O2 under some conditions to make NO2. NO2 at low levels is smog (Nitrogen Dioxide).
Argon (Ar) does not combine. It exists as single atoms. Often used in light bulbs.
Oxygen (O2 and O3) - O2 makes up about 21% of the air that we breathe. It is necessary for life.
O3 - is Ozone:
Upper Atmosphere Ground level
Good - necessary Bad - hazardous
Bad - Hazardous damages plants, animals, and causes respiratory illnesses
absorbs ultraviolet radiation produced by the combustion of fosil fuels
destroyed by CFC’s, other air pollutants
Carbon Dioxide :
It is a compound of Carbon and Oxygen (1 Carbon 2 Oxygen)
in well mixed air it is about 0.03%.
This has almost doubled in 25 years.
It is necessary for life.
Carbon Monoxide
It is a compound of Carbon and Oxygen (1 Carbon 1Oxygen)
Body uses it as oxygen, instead of delivering O2 to body, cells deliver CO -causes damage or death to body
