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EARTH SCIENCE LAB # Igneous Rock Identification Name: Date: Lab Day: Lab Period: Part 1: Refer to page 6 of the Earth Science Reference Tables, Scheme for Igneous Rock Identification to help you identify

How to fill out igneous rock identification

How to fill out igneous rock identification:

1. Start by observing the physical characteristics of the rock, such as its color, texture, and grain size. Take note of any unique features or patterns.
2. Use a hand lens or magnifying glass to examine the mineral composition of the rock. Look for different minerals and their arrangement within the rock.
3. Conduct a hardness test to determine the hardness of the rock using the Mohs Scale of Mineral Hardness. Scratch the rock with a known mineral of a certain hardness and compare the results.
4. Perform a streak test by rubbing the rock on a streak plate or unglazed porcelain tile. Note the color of the streak left behind, as it can differ from the rock's overall color.
5. Evaluate the rock's density and weight. Compare it to known densities of common rock types to try and identify the specific type of igneous rock.
6. Examine the rock's texture and determine if it is coarse-grained, fine-grained, vesicular (contains small cavities), or glassy. These characteristics can provide clues about the rock's formation.
7. Finally, compare your observations to a field guide or reference book on igneous rocks to help identify the rock type.

Who needs igneous rock identification?

1. Geologists: Geologists use igneous rock identification to understand geological processes, study Earth's history, and determine the composition and structure of different rock formations.
2. Earth Science Students: Students studying earth science or geology need to learn how to identify igneous rocks as part of their coursework. This knowledge helps them understand the Earth's geological history and processes.
3. Collectors and Hobbyists: Rock collectors and hobbyists may be interested in identifying igneous rocks they find during their outings or while exploring different geological areas. Knowing the type of rock they have can add value to their collection and enhance their overall experience.
4. Environmental Scientists: Environmental scientists may also need to identify igneous rocks as part of their research or when studying geological formations in relation to their impact on the environment.
5. Construction and Mining Industries: Professionals in the construction and mining industries may require igneous rock identification for various purposes, such as identifying suitable materials for construction projects or determining the presence of valuable minerals in mining operations.

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