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4-15-11
4-15-11
Rock cycle song
• Magma rises to form igneous rock• It breaks down by weathering and erosion• It washes away by wind and water, it washes away by
wind and water• It compacts and cements, it compacts and cements• To form sedimentary rock, to form sedimentary rock• It goes under heat and pressure, heat and pressure• To form metamorphic rock, to form metamorphic rock
Type Characteristics ExamplesSedimentary Layered
Fossils conglomerates
Metamorphic SmoothStripesSmall crystals
igneous Small to medium crystalslarge holesglassy
Foliated vs. Nonfoliated metamorphic rock
• Foliated-can see layers• Nonfoliated-cannot see layers
Intrusive vs. Extrusive
• Intrusive igneous rock have larger crystals than extrusive rock because it takes more time to cool inside the Earth thus allowing crystals more time to “grow”
Weathering song• "Wea-ther-ing! (pause) Ero-sion! (pause) De-po-si-tion!"
repeatedly. For weathering, students will stick out three fingers on each hand to form W's. Rhythmically, they will slam their W's together to represent the breaking of rocks. During the erosion portion of the chant, instruct students to move their hands in a sideways wave motion, similar to a hula dancer. If your classroom has enough room, allow students to slide sideways to model the movement of erosion. Finally, when students chant "De-po-si-tion," they should make a downward motion with their hands and kneel to the ground, showing how particles eventually deposit or stop.
Deposition
• Dropping off of particles• Occurs where water moving slowest• Erosion occurs where water moving fastest
Deposition
Most erosion at points ____ and ____.Most deposition at points ____ and ____.
Deposition
Most erosion at points _B___ and __C__.Most deposition at points __A__ and __D__.
Rock #1
Rock #1 obsidian
Obsidian is lava that has cooled without forming crystals, giving it a glassy texture. See more obsidian photos and learn more about obsidian in the obsidian picture gallery. For photos of related rocks, see the extrusive volcanic rocks gallery. Fossils
Rock #2
Rock #2 granite
Granite is a coarse-grained, light colored, intrusive igneous rock that contains mainly quartz and feldspar minerals. The specimen above is about two inches (five centimeters) across.
Rock #3
Rock #3 basaltBasalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene. The specimen shown is about two inches (five centimeters) across.
Rock #4
Rock #4 Scoria• Scoria is a dark-colored, vesicular, extrusive igneous rock. The vesicles are a result
of trapped gas within the melt at the time of solidification. It often forms as a frothy crust on the top of a lava flow or as material ejected from a volcanic vent and solidifying while airborne. The specimen shown above is about two inches (five centimeters) across.
Rock #5
Rock #5 rhyolite• Rhyolite is a light-colored, fine-grained, extrusive igneous rock that
typically contains quartz and feldspar minerals. The specimen shown
above is about two inches (five centimeters) across.
Rock #6
Rock #6 shalesedimentary rock that easily breaks off in layers
Rock #7
Rock #7 breccia
The angular clasts in this breccia are chert fragments. The matrix is an iron-stained mix of clay through sand-size particles. The specimen is about two inches (five centimeters) across.
Rock #8
Rock # 8 Sandstone
Sandstone is a clastic sedimentary rock made up mainly of sand-size (1/16 to 2 millimeter diameter) weathering debris. Environments where large amounts of sand can accumulate include beaches, deserts, flood plains and deltas.
Rock #9
Rock #9 Conglomerate
Conglomerate is a clastic sedimentary rock that contains large (greater than two millimeters in diameter) rounded clasts. The space between the clasts is generally filled with smaller particles and/or a chemical cement that binds the rock together.
Rock #10
Rock #10 Limestone
Limestone is a sedimentary rock composed primarily of calcium carbonate (CaCO3) in the form of the mineral calcite. It most commonly forms in clear, warm, shallow marine waters. It is usually an organic sedimentary rock that forms from the accumulation of shell, coral, algal and fecal debris. It can also be a chemical sedimentary rock formed by the precipitation of calcium carbonate from lake or ocean water.
Rock #11
Rock #11 slate• Slate is a foliated metamorphic rock that is formed through the
metamorphism of shale. It is a low grade metamorphic rock that splits into thin pieces.
Rock #12
Rock #12 marbleMarble is a non-foliated metamorphic rock that is produced from the metamorphism of limestone. It is composed primarily of calcium carbonate.
Rock #13
Rock #13 quartzite• Quartzite is a non-foliated metamorphic rock
that is produced by the metamorphism of sandstone. It is composed primarily of quartz.
Rock #14
Rock #14 gneissGneiss is foliated metamorphic rock that has a banded appearance and is made up of granular mineral grains. It typically contains abundant quartz or feldspar minerals.
Rock #15
Rock #15 schist
Schist is metamorphic rock with well developed foliation. It often contains significant amounts of mica which allow the rock to split into thin pieces. It is a rock of intermediate metamorphic grade between phyllite and gneiss
Rock #16
• Limestone
Rock #17
• Coal
Rock #18
• Sandstone
