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Hydrogen and Helium
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∙ 14y ago
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Should you put chemicals in your pool first or skim and vacuum first?
It's always better to skim and vacuum first, then balance the chemicals
How did oxygen first enter earths athmosphere?
biological process
What are the advantages to a chemical fume hood?
Chemical fume hoods are the first protection against exposure to dangerous chemicals that all laboratory users should have. They are the first line of defense against inhaling chemicals.
First step of coal formation is what?
The first stage in coal formation is the deposition of material composed of twigs, leaves, branches, and other plant debris..
Why shouldn't you mix chemicals without permission?
Because you either a) don't know what they are or b) don't know what they will result in when combined or c) do not have permission to possess those chemicals in the first place or d) all of the above.
What is earths atmosphere is primarily composed of?
the earth first atmosphere is troposphere
The first layer of the earths atmosphere touching earths surface?
mesosphere
The first layer of the earths atmosphere touching earths surf?
troposphere
Earths atmosphere was first changed by?
photosynthesis
The first Indian Satellite aryabhatta was launched from?
the earths atmosphere
The first layer of earths atmosphere touching the earth?
troposphere
What was the first ever man made object to leave the earths atmosphere?
sputnik
Who was the first to prove comets lie beyond earths atmosphere?
TyCHO BRACHE
What was most abundant gas in the earths first atmosphere?
This gas was carbon dioxide.
The Earths atmosphere is composed of how many different layers?
The Earth's atmosphere is composed in FIVE different layers. The first one is the Troposphere, which is the closest to the Earth's surface. The second one is the stratosphere. The third atmosphere is called the mesosphere, which contains the coldest air temperature. The forth is thermosphere, which contains the ionosphere that are made up of electrically charged particles (note that the ionosphere is not one of the atmosphere). The last part of the atmosphere is the exosphere, which is the region of the space travel. It is also the furthest atmospheric layer from the Earth.
What is earths first layer of atmosphere called?
It's called lithosphere as I remember in science.
What was Earths first atmosphere was created by?
The earths first atmosphere was created by the methane, carbon dioxide, sulphur oxides and water vapor that volcanoes were pumping out. Oxygen started to come in noticeable quantities once life had formed. Nitrogen is inert, so doesn't do anything.
