Rocks And Minerals Post-assessment (Earth Science Regents)

The answer "1,2,3,4" suggests that the person has knowledge about maps and measurement across all levels, from the lowest to the highest. It implies that the person has a comprehensive understanding of maps and measurement, ranging from basic concepts to advanced techniques.

The given answer options suggest that the question is asking the respondent to rate their level of interest in maps and measurement on a scale of 1 to 4. The answer indicates that the respondent can choose any number from 1 to 4 to indicate their level of interest, with 1 being the lowest and 4 being the highest.

Luster refers to the way a mineral reflects light. It describes the appearance or quality of the shine on the surface of a gemstone when light is reflected off of it. Different minerals can have different types of luster, such as metallic, vitreous (glassy), pearly, or silky. The luster of a gemstone is an important factor in determining its value, as it contributes to its overall appearance and beauty.

The minerals that are most commonly found in the igneous rock granite are plagioclase feldspar, potassium feldspar, and quartz. These minerals are commonly found in granite and are used to identify and classify the rock. Plagioclase feldspar and potassium feldspar are both types of feldspar minerals, which are abundant in granite. Quartz is also commonly found in granite and is a major component of the rock. Together, these three minerals make up the majority of the composition of granite.

Sand particles are categorized as being between 0.006 cm and 0.2 cm in size. This range is determined by the Earth Science Reference Tables (Standard 2.1v).

Rock 1 is the correct answer because it is the only rock that is described as metamorphic and shows evidence of foliation.

The density of a material is defined as its mass per unit volume. In the given graph, the density can be determined by finding the slope of the line connecting the points for samples A, B, and C. The slope represents the change in mass divided by the change in volume. From the graph, it can be observed that the slope is equal to 10.0 g/cm3, indicating that the density of the material is 10.0 g/cm3.

Rocks are classified as igneous, sedimentary, or metamorphic based primarily on their method of formation. This is because the process by which a rock is formed determines its characteristics and properties. Igneous rocks are formed from the solidification of molten material, sedimentary rocks are formed from the accumulation and compaction of sediment, and metamorphic rocks are formed from the transformation of existing rocks through heat and pressure. Therefore, the method of formation is a key factor in classifying rocks into these three major categories.

The crystals in choice D appear to be small and tightly packed together. This suggests that they formed from molten material that cooled and solidified rapidly. When molten material cools quickly, there is less time for the crystals to grow, resulting in smaller and more closely packed crystals.

The correct answer is "From clay and sand grain deposited, and cemented together by minerals." This process refers to the formation of sedimentary rock, which occurs when sediments like clay and sand are deposited, compacted, and cemented together by minerals over time. This process is common in areas like the Allegheny Plateau, where layers of sediment accumulate and eventually harden into bedrock.

The correct answer suggests that the rock containing the fossil was formed through the compaction and cementation of sediments deposited in a marine environment during the Cambrian Period. This means that the sediments were compacted and hardened over time, forming a solid rock. The mention of a marine environment indicates that the sediments were deposited in a body of water, such as a sea or ocean. The Cambrian Period refers to a geological time period that occurred approximately 541 to 485 million years ago, known for the rapid diversification of life forms.

Dolomite can scratch a copper penny, but cannot be scratched by a fingernail. This is because the hardness of dolomite falls between the hardness of a copper penny (3.0) and a human fingernail (2.5). According to the Mohs scale of hardness, a material can scratch another material if its hardness is greater. Since dolomite can scratch a copper penny, it means that dolomite has a hardness greater than 3.0. However, dolomite cannot be scratched by a fingernail, which has a hardness of 2.5. Therefore, the statement accurately describes the hardness of dolomite in comparison to the other materials listed.