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- 1. HONORS ONLY: ROCK CHANGES/ WEATHERING KEYNOTE By Ryleigh Harris 2/8/23
- 2. Chemical Weathering Chemical weathering describes the process of chemicals in rainwater making changes to the minerals in a rock. Carbon dioxide from the air is dissolved in rainwater, making it slightly acidic. A reaction can occur when the rainwater comes into contact with minerals in the rock, causing weathering
- 3. Physical weathering is the breaking of rocks into smaller pieces. This can happen through exfoliation, freeze-thaw cycles, abrasion, root expansion, and wet-dry cycles. Exfoliation: When temperature of rocks rapidly changes that can expand or crack rocks. Physical Weathering
- 4. Through heat and pressure, the Igneous Rock becomes a Metamorphic Rock. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. How does Igneous Rock become a Metamorphic Rock?
- 5. On the surface, weathering and erosion break down the igneous rock into pebbles, sand, and mud, creating sediment, which accumulates in basins on the Earth's surface. As successive layers of sediment settle on top of one another, the sediment near the bottom is compressed, hardens, and forms sedimentary rock. How does Igneous Rock become a Sedimentary Rock?
- 6. At the surface, metamorphic rocks will be exposed to weathering processes and may break down into sediment. These sediments could then be compressed to form sedimentary rocks, which would start the entire cycle anew. How does Metamorphic Rock become a Sedimentary Rock?
- 7. How does Metamorphic Rock become a Igneous Rock? If the newly formed metamorphic rock continues to heat, it can eventually melt and become magma. When the molten rock cools it forms an igneous rock.
- 8. How does Sedimentary Rock become a Igneous Rock? If a sedimentary rock is subjected to intense heat it will melt. Once it rises up and cools down, it will form an igneous rock.
- 9. How does Sedimentary Rock become a Metamorphic Rock? Sedimentary rock may be broken down into sediment once again by weathering and erosion. It may also form another type of rock. If it becomes buried deep enough within the crust to be subjected to increased temperature and pressure.