ELEMENTS: Where on earth?
The CrustO The outermost layer of the Earth is
called the crust. O Most of the crust is made from only
five elements. O It is rare for elements to occur alone,
although some, like gold and silver, do.
The CrustElement % by MassOxygen 47%Silicon 28%Aluminum 8%Iron 5%Calcium 3%Others 9%
The Atmosphere
O The layer of gases surrounding the Earth is called the atmosphere.
O The oxygen in the atmosphere is necessary for most life on Earth.
The AtmosphereElement % by Mass
Nitrogen 78%
Oxygen 21%
Others 1%
The Ocean
O Ocean water is about 97% water, and the rest is made of other elements and gases.
O There have been around 84 elements identified in sea water.
The Ocean
Element % by Mass
Oxygen 85%
Hydrogen 10%
Chlorine 2%
Sodium 1%
Others 2%
Living Things
O Cells make up living things, and elements make up cells.
Living Things
Element % by Mass
Hydrogen 59%Oxygen 24%Carbon 11%Nitrogen 4%Others 2%
Top 8 ElementsOThe following 8 elements are the most important for you to know. The are……….
Guess the 8! (KORT Tickets)
OHONOCONa
Guess the 8! (KORT Tickets)
OHeOOOClOCa
The Top 8 (Copy into your journal)
H
Hydroge
n
He
Helium
N
Nitrogen
O
Oxygen
C
Carbon
Cl
Chlorine
Na
Sodium
Ca
Calcium
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