Soil
Rocks and Minerals
Geological History
Earth's Layers
Weathering and Erosion
100
The pieces of weathered rock in soil
What are sand, silt, and clay?
100
Rock formed from cooling of melted rock (magma/lava)
What is igneous?
100
The layer that is typically oldest in a sample of layered rock
What is the bottom layer?
100
The outermost layer of Earth
What is the crust?
100
Caves, sinkholes, canyons, and sand dunes have this in common.
What are examples of land formations caused by weathering and erosion?
200
The coarse grained type of weathered rock that makes up soil
What is sand?
200
Rock formed from heat and pressure on any other kind of rock
What is metamorphic?
200
the time frame of a geological era
What is many millions of years?
200
What many scientists think is responsible for the movement of plates
What are convection currents?
200
The part of Indiana that is more flat
What is the northern part?
300
The finest grained category of weathered rock in soil
What is clay?
300
Bits of weathered rock that have been compacted and cemented together
What is sedimentary rock?
300
fossil limestone and crinoids found in Indiana
What is evidence that Indiana was once under a shallow sea (marine environment)?
300
Detected by a compass and caused by the metal in the core
What is Earth's magnetic field?
300
Caves and sinkholes were formed in Indiana limestone this way.
What is ground water erosion of limestone?
400
The other major component of soil, besides weathered rock, water, and air
What is organic material (organic matter)?
400
The type of rock where fossils generally form
What is sedimentary rock?
400
Fossils of fish found in layers at the tops of mountains
What is evidence that the mountain was once under water?
400
The majority of earthquakes and volcanoes occur here.
What is the edges of the tectonic plates?
400
Scientists believe these caused the pattern of hills and flat land in Indiana.
What are glaciers?
500
Three propertiesof soil, all beginning with "c," that are used to identify soil type
What are color, composition, and consistence?
500
Two factors that destroy fossils in other types of rock
What are heat and pressure?
500
Paleozoic, Mesozoic, and Cenozoic
What are the three geological eras?
500
The layer of molten metals that is responsible for the Earth's magnetic field
What is the outer core?
500
the name given to land formations of limestone
What is Karst Topography?
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