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Chapter 8 Vocabulary
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Published on Nov 18, 2015
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1.
Chapter 8 Vocabulary
By Dominik
Photo by
NASA's Marshall Space Flight Center
2.
fold mountain
A mountain made up mostly of rock layers folded by being squeezed together
3.
fault-block mountain
A mountain made by huge tilted blocks of rocks separated from surrounding rocks by faults
Photo by
Ken Lund
4.
weathering
The breaking down of rocks into smaller pieces by natural processes
5.
erosion
The picking up and removal of rock particles
Photo by
brewbooks
6.
soil
A mixture of weathered rock, decayed plant and animal matter, living things, air, and water
Photo by
arimoore
7.
humus
Material in soil formed by the breakdown of plant and animal material
Photo by
Zane Selvans
8.
soil horizon
Any of the layers of soil from the surface to the bedrock below
Photo by
FortGirl
9.
groundwater
Water that soaks into soil and rock by collecting in spaces between rock particles
Photo by
USFWS/Southeast
10.
mass wasting
The downhill movement of Earth material caused by gravity
11.
deposition
The dropping off of sediment
Photo by
Unhindered by Talent
12.
glacier
A huge sheet of ice and snow that moves slowly over the land
Photo by
.:Adry:.
13.
till
A jumble of many sizes of sediment deposited by a glacier
Photo by
Thomas Fisher Rare Book Library
14.
moraine
A deposit of many sizes of sediment in front of or along the sides of a glacier
15.
mineral
A naturally occurring solid in Earth's crust with a definite structure and composition
16.
igneous rock
A rock that forms when hot, liquid lava cools and hardens into a solid
17.
sedimentary rock
A rock that forms from pieces of other rocks that are squeezed or cement together
18.
metamorphic rock
A rock that forms from another kind of rock that is changed by heat, pressure, or a chemical reaction
19.
rock cycle
Rocks continually changing from one kind into another in a never-ending process
20.
superposition
The idea that in a series of rock layers, the bottom layer is the oldest and the top layer is the youngest
21.
relative age
The age of a rock as compared with another rock
Photo by
Travis S.
22.
geologic column
A listing of Earth's rock layers in order from oldest to youngest
23.
fossil
Any trace, imprint, or remains of a living preserved in Earth's crust
24.
index fossil
The remains of a living thing that was widespread but lived for only a short part of Earth's history
25.
half-life
The time it takes for half the mass of a radioactive element in a rock to break apart, or decay, into other elements
26.
absolute age
The age of a rock in years, as determined by measuring the decay rate of its radioactive elements
27.
era
One of the four long stretches of time in Earth's history
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