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An overview of the distribution of water on Earth.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
An overview of the distribution of water on Earth.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
How to use parallax to measure distances to stars.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
The Higgs boson is important because it gives objects mass. Scientsts predicted that it existed and built CERN to test that hypothesis. They discovered it in July 2012.
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Early seismolgists studying the travel times of seismic waves discovered that Earth has an inner and an outer core.
It is an educational content of CK-12 Foundation (to access some of the CK-12 content ...
Charles David Keeling began measuring atmospheric carbon dioxide levels on top of Mauna Loa volcano in 1958. These data are extremely valuable in showing how fossil fuel burning is adding carbon to th ...
Hydrothermal vents are found at spreading ridges where cold seawater comes into contact with hot magma. The vents have amazing mineral chimneys and strange life forms that are dependent on chemosynthe ...
Bertram Boltwood first used radiometric dating to determine the ages of rocks and of Earth. Although his calculations were not completely accurate, he brought in an important new source of scientific ...
Leon Teisserenc de Bort used unmanned balloons carrying instruments to discover the troposphere and the stratosphere. He was the first to recognize the different temperature structure of the two layer ...
Using a compass to determine direction.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
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