The Atmosphere
___________ forms when oxygen reacts to ultraviolet radiation from the Sun or electrical discharges from storms.
Ozone
Which sphere has a very low concentration of gases?
The exosphere
___________ __________ is the alteration of the air’s normal composition.
Atmospheric pollution
What is the name of the process in which water turns from a solid to a liquid?
Melting
What percent of all water on Earth is in the seas and oceans?
97.5%
What percent of the atmosphere is made up of oxygen?
21%
Which sphere absorbs most of the powerful radiation from the sun?
The Thermosphere
Where do natural pollutants come from?
Natural phenomena
What is the name of the process in which water turns from a gas to a liquid?
Condensation
We can only use __% of the freshwater that’s available on the Earth’s surface and in the atmosphere.
0.4%
What percent of the atmosphere is made up of Nitrogen?
78%
When small meteorites break up in the thermosphere, shooting stars appear in the ___________.
Mesosphere
Industries, transport, and heating are the main causes of ________ pollutants.
Chemical
What is the name of the process in which water turns from a solid to a gas?
Sublimation
The ______ ______ consists of many processes that allow water to change state and travel between the atmosphere and the Earth’s surface.
Which two gases in the atmosphere don't react with other gases?
Helium and Argon
What direction do the gases in the stratosphere move?
Horizontally
What are the two types of physical artificial pollutants?
Radioactivity, lights/noise
What is the name of the process in which water turns from a gas to a solid?
Deposition
What percent of freshwater is found in glaciers?
68.7%
What are the two important functions of the atmosphere?
In which sphere do we find meteorological phenomena such as wind and rain?
Troposphere
_____ ______ is a direct consequence of the release of nitrogen and sulfur oxides into the atmosphere.
Acid rain
What are two ways in which water helps support life and our planet?
Transpiration.