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Weathering and Soil

Chapter 2 Vocabulary

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1.anything in the environment that humans use (2 words)
5.loose layer of dead plant leaves and stems on the surface of the soil
7.rock that forms when a rock is changed by heat, pressure, or chemical reactions (2 words)
8.characteristic of a material full of tiny, connected air spaces that water can seep through
9.natural inorganic solid with a crystal structure and definite chemical composition
10.chemical and physical processes that break down rock at Earth's surface
13.layer of soil beneath the topsoil
14.type of rock that forms when particles from other rocks or the remains of plants and anumals are pressed and cemeted together (2 words)
16.solid rock beneath the soil
17.type of weathering in which rock os physically broken into smaller pieces (2 words)
20.solid in which the atoms are arranged in a pattern that repeats again and again
21.organism that breaks down wastes and dead organisms
24.geologic principle that the same geologic processes that operate today operated in the past to change Earth's surface
26.plowing fields along the curves of a slope to prevent soil loss (2 words)
31.anything in the environment that humans use (2 words)
33.thick mass of grass roots and soil
35.management og soil to prevent its destruction (2 words)
36.layer of soil that differs in color and texture from the layers above or below it (2 words)
37.process by which ore is melted to seperate the useful metal from other elements
38.area of the Great Plains where wind erosion caused soil loss during the 1930s (2 words)
1.natural resource that is not replaced in a useful time frame (2 words)
2.rich, fertile soil that is made up of about equal parts of clay, sand, and silt
3.mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil
4.process that breaks down rock through chemical changes (2 words)
6.process that splits rock when water seeps into cracks, then freezes and expands (2 words)
11.series of processes on the surface and inside Earth that slowly changes rocks from one kind to another (2 words)
12.soil conservation method in which the dead stalks from the previous year's crop are left in the ground to hold the soil in place (2 words)
15.planting of different crops in a field each year to maintain the soil's fertility (2 words)
18.grinding away of rock by other rock particles carried in water, ice, or wind
19.word used to describe a substance that feels slippery and changes red litmus paper blue
22.rock that contains a metal or useful mineral
23.loose, weathered materials on Earth's surface in which plants can grow
25.type of rock that forms from the cooling of molten rock at or below the surface (2 words)
27.chemical change in which a substance combines with oxygen
28.dark-colored organic material in soil
29.measure of how well soil supports plant growth
30.small, solid pieces of materials from rocks or organisms; earth materials deposited by erosion
32.process by which water, ice, wind, or gravity moves weathered rock or soil
34.describes a substance that reacts strongly with metals and changes blue litmus paper red

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