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Rocks and Minerals Unit

Mr. Ramirez

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Across
4.magma that has erupted from a volcano or a fissure (crack) in the Earth's crust
11.the wearing down and breaking of hard rock by natural forces like wind, ice, plants, and burrowing animals
12.a method of reducing erosion in which farmers plant crops on flat terraces cut into hillsides
13.a mixture of small pieces of rock and material from living things
14.the small pieces of rock that form when rock breaks down
15.the solid layer of Earth's surface
17.rock that formed when other rock is chemically changed deep inside Earth by heat and pressure
19.rock that forms from layers of soil and sediment that are squeezed together
21.a boundary where plates slide past each other
22.a quality of something, such as color or hardness
23.the middle layer of Earth, the thickest layer below the crust, made up of hot, dense rock that tectonic plates float on
25.the remains, trace, or print of an organism that lived in a past age
26.the thicker, liquid layer of Earth's core
28.a boundary where plates push together
29.a place where tectonic plates meet
31.an opening in Earth's crust through which melted rock, gases, and ash can be released
32.one of Earth's surace features
33.the sudden movement of weathered rocks and soil downhill
Down
1.a huge sheet of ice that moves slowly over land
2.molted rock below or within the Earth's crust
3.one of the large, slowly moving pieces of Earth's crust
5.a break in Earth's crust where movement can occur
6.the dropping of material by water, wind, or glaciers
7.the outermost layer of Earth; upper layer on which we live (broken into pieces called tectonic plates that float on next surface, the mantle)
8.the process by which weathered rock is picked up and moved
9.a solid, nonliving mineral found in the ground
10.a boundary where two plates move away from each other
16.a mountain formed where two continental plates push together, bending and lifting layers of rock
18.rock that forms when melted rock cools and hardens
20.a method of reducing erosion in which farmers plow across the sides of hills instead of down their slopes
24.the land near a river where water from a flood slows down and drops the sediment it is carrying
27.the shaking of Earth's surface when pieces of Earth's crust move along a fault
30.a solid, nonliving material made up of one or more materials

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