8th Grade Rocks and Mineral Powerpoint
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Rocks and Minerals Presentation By 8 th grader
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It was too cold to go out rock collecting this winter. Instead the students went rock hunting digitally. They were given two grades for their powerpoints, the science grade based on the accuracy of their information and a grade on using effective design skills in powerpoint.
Transcript of 8th Grade Rocks and Mineral Powerpoint
Rocks and Minerals Presentation
By 8th grader
Red Blood Garnet
Garnets come in different colors like red. Also they have different groups.
JADE
Jades were used for axe heads, knifes, and other weapons. Because other technologies were invented it’s used for decorative stuff.
GOLD
This type of metal has been used for jewelry, money, or store as value.
AQUAMARINE
It is a Gem Stone that is used in Jewelry. Its related to the Emerald.
IGNEOUS ROCKS
OBSIDIAN
Because the edges of Obsidian rocks are so thin, they were use for projectile points, and know for scalpel blades.
BASALT
Basalt is a volcanic rock. It is a fine grained rock because of how fast the cooling process happened.
GABRO
This is a coarse grained intrusive igneous rock. It is also equivalent to Basalt.
RHYOLITE
Rhyolite is considered as a extrusive volcanic rock.
PUMICE
Pumice is considered an Extrusive rock, Because Pumice is a term for volcanic rock. Also it is a glass rock because it has no crystal structures.
SEDIMENTARY ROCKS
CONGLOMERATE
This sedimentary rock is sometimes used to make cement.
BRECCIA
Breccia is formed from piles of broken rocks at the bottom of cliffs.
SANDSTONE
Sandstone forms from grains of sand cemented together by hardened minerals.
SILTSTONE
Siltstone is made from silt particles cemented together.
SHALE
Shale is made of layers of silt and clay. Also it is used to make bricks.
METAMORPHIC ROCKS
SCHIST
This rock can form from shale. It can even split into thinner layers than slate.
WHITE MARBLE
Marble is white but the minerals can change it into different colors like oink. This marble is used on buildings.
SLATE
When shale changes it turns into slate. It’s is so thin its used for thin things like chalkboards.
QUARTZITE
By sandstone being into a lot of pressure inside the earth it turns into Quartzite. This can be to 500 million years old.
GNEISS
This rock has bands that is speckled black and white. It also has twist and curves of where it almost melted.
IGNEOUS
SEDIMENTARY METAMORPHIC
Weathering
Heat pressure
Heat Cooling
CrustMantle
core
