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Apologia module 6

Apologia science module 6 terms and questions

Catastrophism The view that most of the earth’s geological features are the result of large-scale catastrophes such as floods, volcanic eruptions, ect
Uniformitarianism The view that most of the earth’s geological features are the result of slow, gradual processes that have been at work for millions or even billions of years
Humus The decayed remains of once-living creatures
Minerals Inorganic crystalline substances found naturally in the earth
Weathering The process by which rocks are broken down by the forces of nature
Erosion The process by which sediments and rock fragments are carried away by wind or rain
Unconformity A surface of erosion that separates one layer of rock from another
Which hypothesis (uniformitarianism or catastrophism) requires that the earth be billions of years old? The uniformitarianism hypothesis
Which agent is responsible for laying down most of the sedimentary rock that we see today? Most of it has been laid down by water
What happens during the process of chemical weathering? The composition of the rock changes
What happens during the process of physical weathering? The physical appearance of the rock changes; there is no change in the rock's composition
Where do a large part of the sediments carried by a river go? Many sediments carried by a river are deposited in the river's delta
What causes an underground cavern to form? They are formed by erosion caused by groundwater
What is the difference between a stalactite and a stalagmite? Stalactites form on the ceiling of a cavern, while stalagmites form on the floor of a cavern
How are stalactites and stalagmites formed? They are formed when groundwater seeps in through the ceiling of a cavern. As the drop falls to the floor of the cavern, it might deposit sediments on the ceiling or floor. As those sediments pile up, stalactites and stalagmites are formed
Name the four kinds of unconformities. Angular uncomformities, nonconformities, disconformities,and paraconformities
What process forms an intrusion? When magma from underneath the sedimentary rock gets injected into the cracks and fissures of the sedimentary rock
Name the three basic rock types. Igneous, metamorphic, and sedimentary
Created by: JRae