notes science essential question(s) what is the chemical composition of our atmosphere, and how does...
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Notes Science
Essential Question(s)What is the chemical composition of our atmosphere,and how does this illustrate a mixture of gases?
Tennessee SPI Objective:Describe the chemical makeup of the atmosphere.
Check for UnderstandingExplain how the chemical makeup of the atmosphereillustrates a mixture of gases.
SPI 0807.9.5Atmospheric Composition
SPI 0807.9.5Atmospheric Composition Notes Science
An atmosphere is the mass of gases that surrounds a planet and is held in place by the gravity of the planet.Planetary atmospheres are common in our solar system(Even the Moon has a thin atmosphere)
JupiterEarth
The Moon
What is an Atmosphere?
Mars Saturn
Earth's Current Atmosphere…(approx) 78% nitrogen…(approx) 21% oxygen…(approx) 1% other gases (argon, water vapor, carbon dioxide, ozone, etc)
SPI 0807.9.5Atmospheric Composition Notes Science
Earth's Atmosphere
Earth’s atmosphere is a mixture of various gases
Nitrogen
7
N
14.0
Oxygen
8
O
16.0
Argon
18
Ar
39.9
Remember! Our atmosphere is a MIXTURE & not a compound
Earth's Current Atmosphere…(approx) 78% nitrogen…(approx) 21% oxygen…(approx) 1% other gases (argon, water vapor, carbon dioxide, ozone, etc)
SPI 0807.9.5Atmospheric Composition Notes Science
Nitrogen
7
N
14.0
Oxygen
8
O
16.0
Argon
18
Ar
39.9
Where did Earth's atmosphere come from?from comets and planetismals
Venting from volcanoes
oxygen from plants
NotesSPI 0807.9.5
Atmospheric Composition Science
Where did Earth's atmosphere come from?from comets and planetismals (water from space)
NotesSPI 0807.9.5
Atmospheric Composition Science
What are comets?Comets are giant "dirty snowballs" in space.
They consist of frozen water, stellar dust, and rocky debris.p406
Where did Earth's atmosphere come from?Venting from volcanoes3 most common gases from volcanoes(1) Water Vapor, (2) Carbon Dioxide, and (3) Sulfur Dioxide
NotesSPI 0807.9.5
Atmospheric Composition Science
Where did Earth's atmosphere come from?oxygen from plants (plants absorb carbon dioxide & release oxygen)
NotesSPI 0807.9.5
Atmospheric Composition Science
Has Earth's atmosphere ever changed?
NotesSPI 0807.9.5
Atmospheric Composition Science
Earth’s first atmosphere was mostly carbon dioxide, water vapor, & ammonia
Yes it has!
What changed it? Plants converted the carbon dioxide to oxygen , and this oxygen broke down the ammonia into nitrogen.
For the Earth’s atmosphere, section number two in the pieGraph above BEST represents the percentage of…?A) Carbon B) Oxygen C) Argon D) Nitrogen
1
3
2
SPI 0807.9.5Atmospheric Composition Review
Oxygen
Science
In diagram 01 below, which gas is represented in the portionlabeled 1 on the pie chart?A) Argon B) Nitrogen C) Hydrogen D) Oxygen
Review
Diagram 01 Diagram 02
SPI 0807.9.5Atmospheric Composition
Nitrog
en
Science
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SPI 0807.9.5Atmospheric Composition
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SPI 0807.9.5Atmospheric Composition