Mineral Review &GEOLOGY in the NEWS

Review for Thursday’s Assessment• What are the characteristics of a mineral?

HINT: there are 5!• List & Describe the 4 processes that cause

minerals to form• I can think of 10 mineral properties used for

identification…. Can you? WRITE THEM DOWN• Gold has a density of 19.3g/cm3. What would

the mass be of a gold brick that was 30cm x 8cm x 4cm?

What are the characteristics of a mineral?

• Naturally Occurring

• Solid

• Orderly crystalline structure

• Definite Chemical Composition

• Generally considered Inorganic

List & Describe the 4 processes that cause minerals to form

• Crystallization from Magma

• Precipitation

• Pressure and Temperature

• Hydrothermal Solutions

I can think of 10 mineral properties used for identification….

• Luster• Crystal form• Streak• Mohs Hardness• Magnetism

• Double refraction• Cleavage• Fracture• Density• Odor

Gold has a density of 19.3g/cm3. What would the mass be of a gold brick that was 30cm x 8cm x 4cm?

D=M/VM= D * V

M= (19.3g/cm3) * (30*8*4)M= 18,528g or 18.5kg

Questions?

GEOLOGY IN THE NEWS• Volcano eruption in Indonesia kills 3, forces 100,000 to be evacuated • Mount Kelud on Java Island sounded like ‘bombs exploding.’ Ash and grit fell

onto Indonesia’s major cities of Surabaya and Jakarta. Airpots closed. Country has 130 active volcanos.

SINK HOLE

• http://www.cbsnews.com/news/sinkhole-swallow-eight-cars-in-national-corvette-museum-in-kentucky/

Earthquake Watch…

• earthquake.usgs.gov/earthquakes/map/

Road Salt…

• http://www.npr.org/2014/02/17/275899324/got-road-salt-cities-across-the-country-are-running-out-of-it