Rock Cycle
Rocks
Soil
Soil Conservation
Misc
100
igneous rock that cool below earth's surface
intrusive
100
a type of rock formed from the cooling of molten rock
What is igneous rock?
100
mixture of humus, clay and other minerals that forms the crumbly, topmost layer of soil
What is topsoil?
100
the practice of soil conservation that is good for hills or mountains
terraces
100
the process of weathered material being carried away by wind or water or ice
erosion
200
igneous rock the cools on earth's surface
extrusive
200
a series of processes on the surface and inside Earth that slowly changes rocks from one kind to another
What is the rock cycle?
200
dark-colored organic material in soil
What is humus?
200
the practice of saving soil from eroding away
soil conservation
200
these organisms break down organic material
decomposers
300
when particles of minerals, fossils and other sediment glue together to form a rock
cementation
300
a type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions
What is a metamorphic rock?
300
the solid layer of rock beneath the soil
What is bedrock?
300
plowing fields along the curves of a slope to prevent soil loss
What is contour plowing?
300
dead leaves and grass exist on this soil horizon
litter
400
when particles and minerals are squeezed together to form a sedimentary rock
compaction
400
a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
What is sedimentary rock?
400
soil organism that breaks down the remains of organisms and digests them
What is decomposer?
400
the planting of different crops in a field each year to maintain the soil’s fertility
What is crop rotation?
400
fossils are typically found in what type of rock
sedimentary
500
a process of breaking down rocks
weathering
500
the broken pieces of minerals and rocks
sediment
500
the layer of soil that differs in color and texture from the layers above or below it
What is soil horizon?
500
an event that occurred in the area of the Great Plains where wind erosion caused soil loss during the 1930s
What is the Dust Bowl?
500
True/False: intrusive rocks take longer to cool that extrusive rocks
true
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