elements: where on earth?

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